Massachusetts / Waters /
Merrimack River
River in Massachusetts · near Amesbury, Chelmsford, Groveland, Haverhill, Lawrence
Status now
A discharge here was reported but its end never was. Sources often skip the "ceased" notice, so after the first week the water is shown hatched yellow until 30 days have passed, and the event stays flagged on its pages after that.
Why this colour: Unresolved: no end reported: no end reported. Rationale: From day 7 to day 30 the reach or water is shown hatched yellow 'unresolved: no end reported', listed under active discharges with that label. (source: data/rules.json) How long a water stays coloured, and why
Blended discharge of Oct 16 11:05: unresolved, no end reported · LOWELL REGIONAL WASTEWATER UTILITY · on a modeled downstream reach · since Oct 30, 2026, 2:04 PM EDT
Source: LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d890d770-5ba3-4e0d-8602-c861dae1c051, published Oct 16, 2026, 2:04 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
As of Nov 2, 2026, 6:56 AM EST.
Events behind the colour
- Unresolved: no end reported Blended (partially treated) discharge · LOWELL REGIONAL WASTEWATER UTILITY · 035 · Oct 16, 2026, 11:05 AM EDT to ended, time not reported · not reported · Unresolved: no end reported, until Nov 15, 2026, 1:04 PM EST
Source: LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d890d770-5ba3-4e0d-8602-c861dae1c051, published Oct 16, 2026, 2:04 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
- Unresolved: no end reported Combined sewer overflow · CITY OF HAVERHILL · HAV021A MIDDLE SIPHON ESSEX ST · Oct 11, 2026, 10:55 PM EDT to ended, time not reported · not reported · Unresolved: no end reported, until Nov 12, 2026, 6:14 AM EST
Source: CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9889fa84-3ee5-483b-88f6-622b1463807f, published Oct 13, 2026, 7:14 AM EDT, retrieved 2026-11-02 11:54 UTC · notice
- Unresolved: no end reported Combined sewer overflow · CITY OF HAVERHILL · HAV034 MIDDLESEX STREET · Oct 11, 2026, 8:45 PM EDT to ended, time not reported · not reported · Unresolved: no end reported, until Nov 12, 2026, 6:12 AM EST
Source: CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1bbad740-a773-4575-905a-d784c483df4f, published Oct 13, 2026, 7:12 AM EDT, retrieved 2026-11-02 11:54 UTC · notice
- Unresolved: no end reported Blended (partially treated) discharge · LOWELL REGIONAL WASTEWATER UTILITY · 035 · Oct 11, 2026, 4:39 AM EDT to ended, time not reported · not reported · Unresolved: no end reported, until Nov 11, 2026, 5:07 AM EST
Source: LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1ed172ed-ed7a-4cc8-b567-6f33fa4b02e7, published Oct 12, 2026, 6:07 AM EDT, retrieved 2026-11-02 11:54 UTC · notice
- Unresolved: no end reported Combined sewer overflow · LOWELL REGIONAL WASTEWATER UTILITY · LOW008 WEST STREET · Oct 11, 2026, 11:12 PM EDT to ended, time not reported · not reported · Unresolved: no end reported, until Nov 11, 2026, 4:59 AM EST
Source: LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record dd96a2df-46b0-4fa4-951d-ff19be610e0e, published Oct 12, 2026, 5:59 AM EDT, retrieved 2026-11-02 11:54 UTC · notice
- Unresolved: no end reported Combined sewer overflow · LOWELL REGIONAL WASTEWATER UTILITY · LOW030-1 BARASFORD AVE · Oct 11, 2026, 11:00 PM EDT to ended, time not reported · not reported · Unresolved: no end reported, until Nov 11, 2026, 4:48 AM EST
Source: LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 427c64d3-cd52-4961-8be1-00a71470e81e, published Oct 12, 2026, 5:48 AM EDT, retrieved 2026-11-02 11:54 UTC · notice
- Unresolved: no end reported Combined sewer overflow · LOWELL REGIONAL WASTEWATER UTILITY · LOW030-2 MERRIMACK STATION · Oct 11, 2026, 9:57 PM EDT to ended, time not reported · not reported · Unresolved: no end reported, until Nov 11, 2026, 4:45 AM EST
Source: LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 41c6dc16-b968-44ba-940a-6d1b09380903, published Oct 12, 2026, 5:45 AM EDT, retrieved 2026-11-02 11:54 UTC · notice
What the authorities advise
“Avoid contact with these water bodies for 48 hours after the discharge or overflow ceases due to increased health risks from bacteria and other pollutants. See website for more information on whether specific resource areas, such as bathing beaches, are affected.”
Source: LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d890d770-5ba3-4e0d-8602-c861dae1c051, published Oct 16, 2026, 2:04 PM EDT, retrieved 2026-11-02 11:54 UTC · notice
Map
Source: water outlines from OpenBoatLaunch and OpenStreetMap contributors (ODbL); outfalls from EPA ECHO and the state outfall layers; modeled reaches computed by DirtyWaterWatch from USGS NLDI, NHDPlus and the nearest USGS gauge (Jobson 1996); basemap OpenFreeMap and OpenMapTiles.
Outfalls are small brown dots; modeled downstream reaches are dashed.
Modeled downstream reaches on Merrimack River
Modeled downstream reach (estimate, not verified by sampling). Computed by DirtyWaterWatch from the river network and the nearest flow gauge; it is not an official advisory area.
- Unresolved: no end reported 0 to 0.9 km below the outfall
0 to 0.9 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW008
If sewage entered the river at outfall 008 at Oct 11 23:12, water from that point would typically reach here in under an hour (it could be as soon as under an hour) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 0 to 2.6 km below the outfall
0 to 2.6 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-1
If sewage entered the river at outfall 0301 at Oct 11 23:00, water from that point would typically reach here in about 2 hours (it could be as soon as about 1 hour) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 0 to 2.7 km below the outfall
0 to 2.7 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-2
If sewage entered the river at outfall 0302 at Oct 11 21:57, water from that point would typically reach here in about 2 hours (it could be as soon as about 1 hour) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 0 to 2.3 km below the outfall
0 to 2.3 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 11 04:39, water from that point would typically reach here in about 2 hours (it could be as soon as under an hour) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 0 to 2.3 km below the outfall
0 to 2.3 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 16 11:05, water from that point would typically reach here in about 2 hours (it could be as soon as under an hour) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 0.9 to 4.7 km below the outfall
0.9 to 4.7 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW008
If sewage entered the river at outfall 008 at Oct 11 23:12, water from that point would typically reach here in about 3 hours (it could be as soon as about 2 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 2.3 to 2.8 km below the outfall
2.3 to 2.8 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 11 04:39, water from that point would typically reach here in about 2 hours (it could be as soon as about 1 hour) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 2.3 to 2.8 km below the outfall
2.3 to 2.8 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 16 11:05, water from that point would typically reach here in about 2 hours (it could be as soon as about 1 hour) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 2.6 to 3.1 km below the outfall
2.6 to 3.1 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-1
If sewage entered the river at outfall 0301 at Oct 11 23:00, water from that point would typically reach here in about 2 hours (it could be as soon as about 1 hour) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 2.7 to 3.2 km below the outfall
2.7 to 3.2 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-2
If sewage entered the river at outfall 0302 at Oct 11 21:57, water from that point would typically reach here in about 2 hours (it could be as soon as about 1 hour) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 2.8 to 7.5 km below the outfall
2.8 to 7.5 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 11 04:39, water from that point would typically reach here in about 5 hours (it could be as soon as about 3 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 2.8 to 7.5 km below the outfall
2.8 to 7.5 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 16 11:05, water from that point would typically reach here in about 5 hours (it could be as soon as about 3 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 3.1 to 7.8 km below the outfall
3.1 to 7.8 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-1
If sewage entered the river at outfall 0301 at Oct 11 23:00, water from that point would typically reach here in about 6 hours (it could be as soon as about 3 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 3.2 to 7.8 km below the outfall
3.2 to 7.8 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-2
If sewage entered the river at outfall 0302 at Oct 11 21:57, water from that point would typically reach here in about 6 hours (it could be as soon as about 3 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 4.7 to 5.2 km below the outfall
4.7 to 5.2 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW008
If sewage entered the river at outfall 008 at Oct 11 23:12, water from that point would typically reach here in about 4 hours (it could be as soon as about 2 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 5.2 to 9.9 km below the outfall
5.2 to 9.9 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW008
If sewage entered the river at outfall 008 at Oct 11 23:12, water from that point would typically reach here in about 7 hours (it could be as soon as about 4 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 7.5 to 9.3 km below the outfall
7.5 to 9.3 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 11 04:39, water from that point would typically reach here in about 7 hours (it could be as soon as about 4 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 7.5 to 9.3 km below the outfall
7.5 to 9.3 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 16 11:05, water from that point would typically reach here in about 7 hours (it could be as soon as about 4 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 7.8 to 9.6 km below the outfall
7.8 to 9.6 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-1
If sewage entered the river at outfall 0301 at Oct 11 23:00, water from that point would typically reach here in about 7 hours (it could be as soon as about 4 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 7.8 to 9.7 km below the outfall
7.8 to 9.7 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-2
If sewage entered the river at outfall 0302 at Oct 11 21:57, water from that point would typically reach here in about 7 hours (it could be as soon as about 4 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 9.3 to 12.7 km below the outfall
9.3 to 12.7 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 11 04:39, water from that point would typically reach here in about 9 hours (it could be as soon as about 5 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 9.3 to 12.7 km below the outfall
9.3 to 12.7 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 16 11:05, water from that point would typically reach here in about 9 hours (it could be as soon as about 5 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 9.6 to 13 km below the outfall
9.6 to 13 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-1
If sewage entered the river at outfall 0301 at Oct 11 23:00, water from that point would typically reach here in about 9 hours (it could be as soon as about 6 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 9.7 to 13.1 km below the outfall
9.7 to 13.1 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-2
If sewage entered the river at outfall 0302 at Oct 11 21:57, water from that point would typically reach here in about 10 hours (it could be as soon as about 6 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 9.9 to 11.7 km below the outfall
9.9 to 11.7 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW008
If sewage entered the river at outfall 008 at Oct 11 23:12, water from that point would typically reach here in about 9 hours (it could be as soon as about 5 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 11.7 to 15.1 km below the outfall
11.7 to 15.1 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW008
If sewage entered the river at outfall 008 at Oct 11 23:12, water from that point would typically reach here in about 11 hours (it could be as soon as about 6 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
- Unresolved: no end reported 12.7 to 15.7 km below the outfall
12.7 to 15.7 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 11 04:39, water from that point would typically reach here in about 11 hours (it could be as soon as about 7 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
Model stops here: tidal below this point. Below this point water moves back and forth with the tide and wind, so we do not model where the discharge goes. See the official notice and local beach or shellfish advisories.
- Unresolved: no end reported 12.7 to 15.7 km below the outfall
12.7 to 15.7 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall 035
If sewage entered the river at outfall None at Oct 16 11:05, water from that point would typically reach here in about 11 hours (it could be as soon as about 7 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
Model stops here: tidal below this point. Below this point water moves back and forth with the tide and wind, so we do not model where the discharge goes. See the official notice and local beach or shellfish advisories.
- Unresolved: no end reported 13 to 16.1 km below the outfall
13 to 16.1 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-1
If sewage entered the river at outfall 0301 at Oct 11 23:00, water from that point would typically reach here in about 12 hours (it could be as soon as about 7 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
Model stops here: tidal below this point. Below this point water moves back and forth with the tide and wind, so we do not model where the discharge goes. See the official notice and local beach or shellfish advisories.
- Unresolved: no end reported 13.1 to 16.1 km below the outfall
13.1 to 16.1 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW030-2
If sewage entered the river at outfall 0302 at Oct 11 21:57, water from that point would typically reach here in about 12 hours (it could be as soon as about 7 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
Model stops here: tidal below this point. Below this point water moves back and forth with the tide and wind, so we do not model where the discharge goes. See the official notice and local beach or shellfish advisories.
- Unresolved: no end reported 15.1 to 18.1 km below the outfall
15.1 to 18.1 km below the outfall · from LOWELL REGIONAL WASTEWATER UTILITY outfall LOW008
If sewage entered the river at outfall 008 at Oct 11 23:12, water from that point would typically reach here in about 13 hours (it could be as soon as about 8 hours) at the river flow measured at MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA (2010 cfs) at 2026-11-02T11:30:00+00:00. This is a calculation from published USGS methods, not a measurement of bacteria. It does not mark where the river is or is not fit for contact.
Model stops here: tidal below this point. Below this point water moves back and forth with the tide and wind, so we do not model where the discharge goes. See the official notice and local beach or shellfish advisories.
Traced outfall paths
- No current report MA0100447 outfall 002 · 0.343 km traced · Model stops here: tidal below this point
- No current report MA0100447 outfall 003 · 1.581 km traced · Model stops here: tidal below this point
- No current report MA0100447 outfall 005 · 1.048 km traced · Model stops here: tidal below this point
- No current report MA0100633 outfall 002 · 20.65 km traced · Model stops here: tidal below this point
- No current report MA0100633 outfall 007 · 19.313 km traced · Model stops here: tidal below this point
- Unresolved: no end reported MA0100633 outfall 008 · 18.138 km traced · Model stops here: tidal below this point
- No current report MA0100633 outfall 011 · 17.161 km traced · Model stops here: tidal below this point
- No current report MA0100633 outfall 012 · 16.1 km traced · Model stops here: tidal below this point
- No current report MA0100633 outfall 027 · 18.067 km traced · Model stops here: tidal below this point
- Unresolved: no end reported MA0100633 outfall 0301 · 16.073 km traced · Model stops here: tidal below this point
- Unresolved: no end reported MA0100633 outfall 0302 · 16.107 km traced · Model stops here: tidal below this point
- No current report MA0101621 outfall 021B · 0.206 km traced · Model stops here: tidal below this point
- Unresolved: no end reported MA0100633 · 15.721 km traced · Model stops here: tidal below this point
- Unresolved: no end reported MA0100633 · 15.721 km traced · Model stops here: tidal below this point
Source: paths traced by DirtyWaterWatch on the USGS NLDI / NHDPlus network from each outfall to the head of tide, the first lake or the distance cap; statuses from the events on them.
The last 90 days
- Unresolved: no end reported: Oct 30, 2026, 3:00 PM EDT to now · set by event 1, event 2, event 3, event 4, event 5, event 6, event 7
- Caution: Oct 11, 2026, 4:00 AM EDT to Oct 30, 2026, 3:00 PM EDT · set by event 1, event 2, event 3, event 4, event 5, event 6, event 7
- Unresolved: no end reported: Sep 30, 2026, 10:00 PM EDT to Oct 11, 2026, 4:00 AM EDT · set by event 1
- Caution: Sep 29, 2026, 10:00 PM EDT to Sep 30, 2026, 10:00 PM EDT · set by event 1, event 2
- Advisory in effect: Sep 27, 2026, 2:00 PM EDT to Sep 29, 2026, 10:00 PM EDT · set by event 1, event 2
- Caution: Sep 20, 2026, 12:00 AM EDT to Sep 27, 2026, 2:00 PM EDT · set by event 1, event 2
- Advisory in effect: Sep 17, 2026, 9:00 PM EDT to Sep 20, 2026, 12:00 AM EDT · set by event 1
- Caution: Sep 16, 2026, 1:00 AM EDT to Sep 17, 2026, 9:00 PM EDT · set by event 1, event 2, event 3, event 4, event 5, event 6, event 7, event 8, event 9, event 10, event 11, event 12, event 13
- Advisory in effect: Sep 13, 2026, 9:00 AM EDT to Sep 16, 2026, 1:00 AM EDT · set by event 1, event 2, event 3, event 4, event 5, event 6, event 7, event 8, event 9, event 10, event 11, event 12
- Unresolved: no end reported: Aug 26, 2026, 7:00 PM EDT to Sep 2, 2026, 12:00 AM EDT · set by event 1, event 2, event 3, event 4, event 5, event 6, event 7, event 8, event 9, event 10, event 11, event 12, event 13, event 14, event 15
- Caution: Aug 25, 2026, 7:00 PM EDT to Aug 26, 2026, 7:00 PM EDT · set by event 1, event 2, event 3, event 4, event 5, event 6, event 7, event 8, event 9, event 10, event 11
- Advisory in effect: Aug 23, 2026, 12:00 PM EDT to Aug 25, 2026, 7:00 PM EDT · set by event 1, event 2, event 3, event 4, event 5, event 6, event 7, event 8, event 9, event 10, event 11
- Unresolved: no end reported: Aug 17, 2026, 12:00 AM EDT to Aug 23, 2026, 12:00 PM EDT · set by event 1, event 2, event 3, event 4, event 5, event 6, event 7, event 8, event 9, event 10, event 11, event 12, event 13, event 14, event 15, event 16, event 17
- Caution: Aug 5, 2026, 8:00 PM EDT to Aug 17, 2026, 12:00 AM EDT · set by event 1, event 2, event 3, event 4, event 5, event 6, event 7, event 8, event 9, event 10, event 11, event 12, event 13, event 14, event 15, event 16, event 17, event 18, event 19, event 20
- Advisory in effect: Aug 4, 2026, 8:00 AM EDT to Aug 5, 2026, 8:00 PM EDT · set by event 1, event 2, event 3, event 4, event 5
Source: hourly statuses computed by DirtyWaterWatch (pipeline build/status.py) from the events linked above and the rules on the methods page; history as of 2026-11-02 11:56 UTC.
Discharges over the years
- Discharge events, last 12 months126Dec 2025 to Nov 2026
- Days with a discharge, last 12 months36Dec 2025 to Nov 2026
- Hours under advisory, last 12 months1,363Dec 2025 to Nov 2026
- 2026 season under advisory23%May to October; 1,022 h
Discharge events per month
912 events, Jan 2022 to Nov 2026. Counted from 905 verified or annual reports, 7 public notices.
- Combined sewer overflow
- Sanitary sewer overflow
- Bypass, blended or other
- No source
- Partly covered or sparse source
No source covers 2022-01 to 2022-04. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Combined sewer overflow | Sanitary sewer overflow | Bypass, blended or other | Total | Counted from | Coverage |
|---|---|---|---|---|---|---|
| Jan 2022 | 0 | 0 | 0 | 0 | No source | |
| Feb 2022 | 0 | 0 | 0 | 0 | No source | |
| Mar 2022 | 0 | 0 | 0 | 0 | No source | |
| Apr 2022 | 0 | 0 | 0 | 0 | No source | |
| May 2022 | 0 | 0 | 0 | 0 | Partly covered or sparse source | |
| Jun 2022 | 0 | 0 | 0 | 0 | Partly covered or sparse source | |
| Jul 2022 | 21 | 0 | 2 | 23 | Verified or annual reports | |
| Aug 2022 | 0 | 0 | 1 | 1 | Verified or annual reports | |
| Sep 2022 | 24 | 0 | 7 | 31 | Verified or annual reports | |
| Oct 2022 | 17 | 0 | 2 | 19 | Verified or annual reports | |
| Nov 2022 | 6 | 0 | 4 | 10 | Verified or annual reports | |
| Dec 2022 | 8 | 0 | 4 | 12 | Verified or annual reports | |
| Jan 2023 | 6 | 0 | 5 | 11 | Verified or annual reports | |
| Feb 2023 | 0 | 0 | 0 | 0 | ||
| Mar 2023 | 8 | 0 | 2 | 10 | Verified or annual reports | |
| Apr 2023 | 24 | 0 | 4 | 28 | Verified or annual reports | |
| May 2023 | 7 | 0 | 3 | 10 | Verified or annual reports | |
| Jun 2023 | 58 | 0 | 9 | 67 | Verified or annual reports | |
| Jul 2023 | 68 | 0 | 11 | 79 | Verified or annual reports | |
| Aug 2023 | 74 | 1 | 6 | 81 | Verified or annual reports | |
| Sep 2023 | 35 | 0 | 7 | 42 | Verified or annual reports | |
| Oct 2023 | 5 | 0 | 1 | 6 | Verified or annual reports | |
| Nov 2023 | 4 | 0 | 1 | 5 | Verified or annual reports | |
| Dec 2023 | 25 | 0 | 11 | 36 | Verified or annual reports | |
| Jan 2024 | 27 | 0 | 8 | 35 | Verified or annual reports | |
| Feb 2024 | 0 | 0 | 1 | 1 | Verified or annual reports | |
| Mar 2024 | 33 | 0 | 11 | 44 | Verified or annual reports | |
| Apr 2024 | 6 | 0 | 4 | 10 | Verified or annual reports | |
| May 2024 | 14 | 0 | 6 | 20 | Verified or annual reports | |
| Jun 2024 | 8 | 0 | 2 | 10 | Verified or annual reports | |
| Jul 2024 | 10 | 0 | 4 | 14 | Verified or annual reports | |
| Aug 2024 | 35 | 0 | 9 | 44 | Verified or annual reports | |
| Sep 2024 | 0 | 0 | 0 | 0 | ||
| Oct 2024 | 0 | 0 | 0 | 0 | ||
| Nov 2024 | 2 | 0 | 3 | 5 | Verified or annual reports | |
| Dec 2024 | 8 | 1 | 3 | 12 | Verified or annual reports | |
| Jan 2025 | 2 | 0 | 3 | 5 | Verified or annual reports | |
| Feb 2025 | 0 | 0 | 5 | 5 | Verified or annual reports | |
| Mar 2025 | 7 | 0 | 4 | 11 | Verified or annual reports | |
| Apr 2025 | 3 | 0 | 4 | 7 | Verified or annual reports | |
| May 2025 | 15 | 0 | 9 | 24 | Verified or annual reports | |
| Jun 2025 | 10 | 0 | 2 | 12 | Verified or annual reports | |
| Jul 2025 | 10 | 0 | 5 | 15 | Verified or annual reports | |
| Aug 2025 | 9 | 0 | 2 | 11 | Verified or annual reports | |
| Sep 2025 | 6 | 0 | 4 | 10 | Verified or annual reports | |
| Oct 2025 | 10 | 0 | 4 | 14 | Verified or annual reports | |
| Nov 2025 | 4 | 0 | 2 | 6 | Verified or annual reports | |
| Dec 2025 | 1 | 0 | 3 | 4 | Verified or annual reports | |
| Jan 2026 | 0 | 0 | 0 | 0 | ||
| Feb 2026 | 0 | 0 | 0 | 0 | ||
| Mar 2026 | 0 | 0 | 3 | 3 | Verified or annual reports | |
| Apr 2026 | 4 | 0 | 1 | 5 | Verified or annual reports | |
| May 2026 | 4 | 0 | 3 | 7 | Verified or annual reports | |
| Jun 2026 | 19 | 1 | 6 | 26 | Verified or annual reports | |
| Jul 2026 | 40 | 0 | 7 | 47 | Verified or annual reports | |
| Aug 2026 | 12 | 0 | 2 | 14 | Verified or annual reports | |
| Sep 2026 | 10 | 0 | 3 | 13 | Verified or annual reports | |
| Oct 2026 | 5 | 0 | 2 | 7 | Public notices (no report yet) | |
| Nov 2026 | 0 | 0 | 0 | 0 |
Hours under advisory per month
Hours this water was under an advisory, by the map's red rules.
- Advisory in effect
- No source
- Partly covered or sparse source
No source covers 2022-01 to 2022-04. 9 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Hours under advisory | From discharge windows | Hours in month | Coverage |
|---|---|---|---|---|
| Jan 2022 | 0 | 0 | 744 | No source |
| Feb 2022 | 0 | 0 | 672 | No source |
| Mar 2022 | 0 | 0 | 744 | No source |
| Apr 2022 | 0 | 0 | 720 | No source |
| May 2022 | 0 | 0 | 744 | Partly covered or sparse source |
| Jun 2022 | 0 | 0 | 720 | Partly covered or sparse source |
| Jul 2022 | 105 | 105 | 744 | |
| Aug 2022 | 51 | 51 | 744 | |
| Sep 2022 | 246 | 246 | 720 | |
| Oct 2022 | 116 | 116 | 744 | |
| Nov 2022 | 169 | 169 | 720 | |
| Dec 2022 | 240 | 240 | 744 | |
| Jan 2023 | 293 | 293 | 744 | |
| Feb 2023 | 0 | 0 | 672 | |
| Mar 2023 | 196 | 196 | 744 | |
| Apr 2023 | 145 | 145 | 720 | |
| May 2023 | 208 | 208 | 744 | |
| Jun 2023 | 424 | 424 | 720 | |
| Jul 2023 | 492 | 492 | 744 | |
| Aug 2023 | 365 | 365 | 744 | |
| Sep 2023 | 353 | 353 | 720 | |
| Oct 2023 | 131 | 131 | 744 | |
| Nov 2023 | 63 | 63 | 720 | |
| Dec 2023 | 348 | 348 | 744 | |
| Jan 2024 | 367 | 367 | 744 | |
| Feb 2024 | 80 | 80 | 696 | |
| Mar 2024 | 359 | 359 | 744 | |
| Apr 2024 | 309 | 309 | 720 | |
| May 2024 | 240 | 240 | 744 | |
| Jun 2024 | 93 | 93 | 720 | |
| Jul 2024 | 189 | 189 | 744 | |
| Aug 2024 | 306 | 306 | 744 | |
| Sep 2024 | 0 | 0 | 720 | |
| Oct 2024 | 0 | 0 | 744 | |
| Nov 2024 | 121 | 121 | 720 | |
| Dec 2024 | 129 | 129 | 744 | |
| Jan 2025 | 111 | 111 | 744 | |
| Feb 2025 | 267 | 267 | 672 | |
| Mar 2025 | 171 | 171 | 744 | |
| Apr 2025 | 169 | 169 | 720 | |
| May 2025 | 317 | 317 | 744 | |
| Jun 2025 | 89 | 89 | 720 | |
| Jul 2025 | 192 | 192 | 744 | |
| Aug 2025 | 123 | 123 | 744 | |
| Sep 2025 | 135 | 135 | 720 | |
| Oct 2025 | 125 | 125 | 744 | |
| Nov 2025 | 184 | 184 | 720 | |
| Dec 2025 | 161 | 161 | 744 | |
| Jan 2026 | 0 | 0 | 744 | |
| Feb 2026 | 0 | 0 | 672 | |
| Mar 2026 | 127 | 127 | 744 | |
| Apr 2026 | 53 | 53 | 720 | |
| May 2026 | 203 | 203 | 744 | |
| Jun 2026 | 274 | 274 | 720 | |
| Jul 2026 | 255 | 255 | 744 | |
| Aug 2026 | 123 | 123 | 744 | |
| Sep 2026 | 168 | 168 | 720 | |
| Oct 2026 | 0 | 0 | 744 | |
| Nov 2026 | 0 | 0 | 32 |
Days with a discharge per month
A day counts when any counted discharge was under way on it (start to reported end, local time); an event with no end counts its start day.
- No source
- Partly covered or sparse source
No source covers 2022-01 to 2022-04.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Days with a discharge | Coverage |
|---|---|---|
| Jan 2022 | 0 | No source |
| Feb 2022 | 0 | No source |
| Mar 2022 | 0 | No source |
| Apr 2022 | 0 | No source |
| May 2022 | 0 | Partly covered or sparse source |
| Jun 2022 | 0 | Partly covered or sparse source |
| Jul 2022 | 4 | |
| Aug 2022 | 1 | |
| Sep 2022 | 7 | |
| Oct 2022 | 4 | |
| Nov 2022 | 5 | |
| Dec 2022 | 5 | |
| Jan 2023 | 9 | |
| Feb 2023 | 0 | |
| Mar 2023 | 6 | |
| Apr 2023 | 4 | |
| May 2023 | 5 | |
| Jun 2023 | 14 | |
| Jul 2023 | 13 | |
| Aug 2023 | 9 | |
| Sep 2023 | 11 | |
| Oct 2023 | 3 | |
| Nov 2023 | 1 | |
| Dec 2023 | 11 | |
| Jan 2024 | 14 | |
| Feb 2024 | 3 | |
| Mar 2024 | 12 | |
| Apr 2024 | 9 | |
| May 2024 | 6 | |
| Jun 2024 | 2 | |
| Jul 2024 | 5 | |
| Aug 2024 | 5 | |
| Sep 2024 | 0 | |
| Oct 2024 | 0 | |
| Nov 2024 | 3 | |
| Dec 2024 | 4 | |
| Jan 2025 | 3 | |
| Feb 2025 | 5 | |
| Mar 2025 | 5 | |
| Apr 2025 | 4 | |
| May 2025 | 10 | |
| Jun 2025 | 2 | |
| Jul 2025 | 6 | |
| Aug 2025 | 2 | |
| Sep 2025 | 3 | |
| Oct 2025 | 4 | |
| Nov 2025 | 4 | |
| Dec 2025 | 4 | |
| Jan 2026 | 0 | |
| Feb 2026 | 0 | |
| Mar 2026 | 3 | |
| Apr 2026 | 2 | |
| May 2026 | 4 | |
| Jun 2026 | 9 | |
| Jul 2026 | 6 | |
| Aug 2026 | 2 | |
| Sep 2026 | 4 | |
| Oct 2026 | 2 | |
| Nov 2026 | 0 |
Reported volume per year
Gallons, summed from the 905 events that gave a number (7 did not).
- Partly covered or sparse source
7 of 912 events gave no volume as a number; only numbers are summed.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Year | Gallons | Events with a number | Events without | Coverage |
|---|---|---|---|---|
| 2022 | 314,350,627 | 96 | 0 | Partly covered or sparse source |
| 2023 | 1,865,916,764 | 375 | 0 | |
| 2024 | 1,325,211,326 | 195 | 0 | |
| 2025 | 623,324,636 | 124 | 0 | |
| 2026 | 278,471,446 | 115 | 7 |
Hours under advisory per year
Hours under advisory each year; 2026 to date.
- Advisory in effect
- Partly covered or sparse source
9 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Year | Hours under advisory | Share of the year | Coverage |
|---|---|---|---|
| 2022 | 927 | 10.6% | Partly covered or sparse source |
| 2023 | 3,018 | 34.4% | |
| 2024 | 2,194 | 25.0% | |
| 2025 | 2,043 | 23.3% | |
| 2026 | 1,202 | 16.4% |
Discharge events by calendar month, all years
Every counted discharge event, by the calendar month it began.
Months are summed over every year a source covers; the table gives the number of years behind each month.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Events | Years of records |
|---|---|---|
| Jan | 51 | 4 |
| Feb | 6 | 4 |
| Mar | 68 | 4 |
| Apr | 50 | 4 |
| May | 61 | 4 |
| Jun | 115 | 5 |
| Jul | 178 | 5 |
| Aug | 151 | 5 |
| Sep | 96 | 5 |
| Oct | 46 | 5 |
| Nov | 26 | 5 |
| Dec | 64 | 4 |
Discharge events by outfall
The 10 outfalls with the most events of 23, all years.
MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Outfall | Discharger | Events |
|---|---|---|
| 035 | LOWELL REGIONAL WASTEWATER UTILITY | 174 |
| LOW030-2 MERRIMACK STATION | LOWELL REGIONAL WASTEWATER UTILITY | 83 |
| LOW027 TILDEN STREET | LOWELL REGIONAL WASTEWATER UTILITY | 78 |
| LOW008 WEST STREET | LOWELL REGIONAL WASTEWATER UTILITY | 74 |
| LOW030-1 BARASFORD AVE | LOWELL REGIONAL WASTEWATER UTILITY | 63 |
| LOW007 BEAVER BROOK | LOWELL REGIONAL WASTEWATER UTILITY | 58 |
| HAV034 MIDDLESEX STREET | CITY OF HAVERHILL | 50 |
| HAV040 BETHANY AVE | CITY OF HAVERHILL | 42 |
| HAV041 CHESTNUT ST | CITY OF HAVERHILL | 40 |
| HAV021A MIDDLE SIPHON ESSEX ST | CITY OF HAVERHILL | 39 |
| Other outfalls (13) | 208 | |
| Outfall not stated | 3 |
How these charts are counted
Discharge events are counted once: where a source publishes both public notices and verified reports (MassDEP, Vermont DEC), a discharger's month with any verified report counts its verified reports only, and other months count notices. Revisions are folded into the record they revise, and EPA copies of a state report are not counted twice. Monthly and yearly totals (Maine DEP, EPA discharge monitoring reports, Portsmouth) are shown on their own and never added to the event counts. Hours under advisory follow the map's red rules. A muted band marks periods no source covers: a gap there is missing data, not a quiet month.
- EPA ECHO sewer overflow events: 2022-05-03 to now (sparse)
- MassDEP sewage notification portal: 2022-06-30 to now
Every event on Merrimack River
| Start | End | Discharger | Outfall | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| Oct 16, 2026, 11:05 AM EDT | ended, time not reported | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d890d770-5ba3-4e0d-8602-c861dae1c051, published Oct 16, 2026, 2:04 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Oct 16, 2026, 11:05 AM EDT · Map |
| Oct 11, 2026, 11:12 PM EDT | ended, time not reported | LOWELL REGIONAL WASTEWATER UTILITY | LOW008 WEST STREET | Combined sewer overflow | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record dd96a2df-46b0-4fa4-951d-ff19be610e0e, published Oct 12, 2026, 5:59 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Oct 11, 2026, 11:12 PM EDT · Map |
| Oct 11, 2026, 11:00 PM EDT | ended, time not reported | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-1 BARASFORD AVE | Combined sewer overflow | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 427c64d3-cd52-4961-8be1-00a71470e81e, published Oct 12, 2026, 5:48 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Oct 11, 2026, 11:00 PM EDT · Map |
| Oct 11, 2026, 10:55 PM EDT | ended, time not reported | CITY OF HAVERHILL | HAV021A MIDDLE SIPHON ESSEX ST | Combined sewer overflow | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9889fa84-3ee5-483b-88f6-622b1463807f, published Oct 13, 2026, 7:14 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Oct 11, 2026, 10:55 PM EDT · Map |
| Oct 11, 2026, 9:57 PM EDT | ended, time not reported | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflow | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 41c6dc16-b968-44ba-940a-6d1b09380903, published Oct 12, 2026, 5:45 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Oct 11, 2026, 9:57 PM EDT · Map |
| Oct 11, 2026, 8:45 PM EDT | ended, time not reported | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflow | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1bbad740-a773-4575-905a-d784c483df4f, published Oct 13, 2026, 7:12 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Oct 11, 2026, 8:45 PM EDT · Map |
| Oct 11, 2026, 4:39 AM EDT | ended, time not reported | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1ed172ed-ed7a-4cc8-b567-6f33fa4b02e7, published Oct 12, 2026, 6:07 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Oct 11, 2026, 4:39 AM EDT · Map |
| Sep 27, 2026, 3:30 PM EDT | Sep 27, 2026, 3:35 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | 30,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 08f675e5-6be6-4032-ba89-d7a35f0f917f, published Oct 27, 2026, 2:49 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Sep 27, 2026, 3:30 PM EDT · Map |
| Sep 27, 2026, 3:30 PM EDT | Sep 27, 2026, 3:35 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) dischargerevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 45722d19-5819-47bb-97ce-8d38f1162916, published Sep 28, 2026, 6:28 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Sep 27, 2026, 3:30 PM EDT · Map |
| Sep 27, 2026, 2:05 PM EDT | Sep 27, 2026, 9:35 PM EDT | CITY OF HAVERHILL | HAV013 LOWER SIPHON BUTTONWOOD AVE | Combined sewer overflow | 299,128 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5a219e13-27a0-42ca-9575-6041f5f019df, published Oct 15, 2026, 11:58 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 27, 2026, 2:05 PM EDT · Map |
| Sep 27, 2026, 2:05 PM EDT | Sep 27, 2026, 9:35 PM EDT | CITY OF HAVERHILL | HAV013 LOWER SIPHON BUTTONWOOD AVE | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5294cae2-a015-4e51-8140-e46860f632c4, published Sep 28, 2026, 10:20 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 27, 2026, 2:05 PM EDT · Map |
| Sep 17, 2026, 9:55 PM EDT | Sep 17, 2026, 11:46 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) dischargerevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record cc151083-6efb-466a-83e2-38b5c9b1613b, published Sep 18, 2026, 1:27 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Sep 17, 2026, 9:55 PM EDT · Map |
| Sep 17, 2026, 9:40 PM EDT | Sep 17, 2026, 11:46 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | 1.24 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e6fc18e6-9d2e-4788-a773-6d282906b859, published Oct 27, 2026, 2:45 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Sep 17, 2026, 9:40 PM EDT · Map |
| Sep 13, 2026, 10:39 PM EDT | Sep 14, 2026, 12:13 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW027 TILDEN STREET | Combined sewer overflow | 460,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 79c66be3-04a8-42d9-a13e-d292e91a2153, published Oct 27, 2026, 2:42 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 10:39 PM EDT · Map |
| Sep 13, 2026, 7:00 PM EDT | Sep 13, 2026, 6:36 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) dischargerevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 19a401b0-e425-4f36-9e5c-95dec05faa19, published Sep 13, 2026, 7:50 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 7:00 PM EDT · Map |
| Sep 13, 2026, 3:36 PM EDT | Sep 13, 2026, 3:49 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a209897c-ac12-43e3-b2c5-8de546dbe328, published Sep 13, 2026, 8:09 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 3:36 PM EDT · Map |
| Sep 13, 2026, 3:06 PM EDT | Sep 13, 2026, 3:31 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-1 BARASFORD AVE | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7a19556a-4f73-4b48-87f6-4e29f4f86c06, published Sep 13, 2026, 8:10 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 3:06 PM EDT · Map |
| Sep 13, 2026, 1:35 PM EDT | Sep 13, 2026, 2:15 PM EDT | CITY OF HAVERHILL | HAV024 VARNUM ST UPPER SIPHON | Combined sewer overflow | 118,348 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b8ac5444-ce32-42d1-a2ca-99941c572739, published Oct 16, 2026, 12:03 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 1:35 PM EDT · Map |
| Sep 13, 2026, 1:35 PM EDT | Sep 13, 2026, 2:15 PM EDT | CITY OF HAVERHILL | HAV024 VARNUM ST UPPER SIPHON | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 740e28f2-06e8-4c63-9918-f92873852e42, published Sep 14, 2026, 1:29 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 1:35 PM EDT · Map |
| Sep 13, 2026, 1:25 PM EDT | ended, time not reported | LOWELL REGIONAL WASTEWATER UTILITY | LOW027 TILDEN STREET | Combined sewer overflow | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record aa208211-ed39-4d87-9166-07232ac67458, published Sep 13, 2026, 7:55 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 1:25 PM EDT · Map |
| Sep 13, 2026, 12:15 PM EDT | Sep 13, 2026, 1:15 PM EDT | CITY OF HAVERHILL | HAV013 LOWER SIPHON BUTTONWOOD AVE | Combined sewer overflow | 82,100 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ce7974c0-ba38-4edd-8413-e557e7bc32c6, published Oct 16, 2026, 12:18 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 12:15 PM EDT · Map |
| Sep 13, 2026, 12:15 PM EDT | Sep 13, 2026, 1:15 PM EDT | CITY OF HAVERHILL | HAV013 LOWER SIPHON BUTTONWOOD AVE | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 771e006b-0394-4c62-b819-b4ba842fb6e8, published Sep 14, 2026, 1:26 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 12:15 PM EDT · Map |
| Sep 13, 2026, 11:11 AM EDT | Sep 13, 2026, 3:31 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-1 BARASFORD AVE | Combined sewer overflow | 8.17 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3312afee-035d-414a-b6b9-9f18bafac1c3, published Oct 27, 2026, 2:43 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 11:11 AM EDT · Map |
| Sep 13, 2026, 11:08 AM EDT | Sep 13, 2026, 11:21 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW007 BEAVER BROOK | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9666881c-0d75-42c6-8006-827628a380a0, published Sep 13, 2026, 8:07 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 11:08 AM EDT · Map |
| Sep 13, 2026, 10:53 AM EDT | Sep 13, 2026, 3:49 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflow | 25.69 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8e07cf5d-7cb4-45dc-b0f9-672e78ffa023, published Oct 27, 2026, 2:44 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 10:53 AM EDT · Map |
| Sep 13, 2026, 10:47 AM EDT | Sep 13, 2026, 11:21 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW007 BEAVER BROOK | Combined sewer overflow | 180,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e299b4de-238e-4e1b-b244-951e364b0ab8, published Oct 27, 2026, 2:40 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 10:47 AM EDT · Map |
| Sep 13, 2026, 10:13 AM EDT | Sep 13, 2026, 6:36 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | 18,370 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 48b8b9cf-7dce-433b-9aae-97dd98bdc8ea, published Oct 27, 2026, 2:39 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 10:13 AM EDT · Map |
| Sep 13, 2026, 9:50 AM EDT | Sep 13, 2026, 1:05 PM EDT | CITY OF HAVERHILL | HAV021A MIDDLE SIPHON ESSEX ST | Combined sewer overflow | 124,922 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 55eba55f-8346-4118-863c-acaa587bbe71, published Oct 16, 2026, 12:22 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 9:50 AM EDT · Map |
| Sep 13, 2026, 9:50 AM EDT | Sep 13, 2026, 1:05 PM EDT | CITY OF HAVERHILL | HAV021A MIDDLE SIPHON ESSEX ST | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8de19f26-b2ec-4f1b-a2c0-868955916221, published Sep 14, 2026, 12:38 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 9:50 AM EDT · Map |
| Sep 13, 2026, 9:45 AM EDT | Sep 13, 2026, 2:05 PM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflow | 305,358 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2564c89c-9a23-498b-bd46-0a6907d276a5, published Oct 16, 2026, 12:25 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 9:45 AM EDT · Map |
| Sep 13, 2026, 9:45 AM EDT | Sep 13, 2026, 9:45 AM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflow | 0 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 83052c1f-b9c8-48d7-b68e-cc6751f48eee, published Oct 16, 2026, 12:20 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 9:45 AM EDT · Map |
| Sep 13, 2026, 9:45 AM EDT | Sep 13, 2026, 2:05 PM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3f87d195-d85f-4c7a-8f68-885875dc5ed7, published Sep 14, 2026, 12:38 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 9:45 AM EDT · Map |
| Sep 13, 2026, 9:45 AM EDT | Sep 13, 2026, 2:05 PM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflow | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 29adbf22-b599-4078-a240-2859663a82a7, published Sep 14, 2026, 12:36 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Sep 13, 2026, 9:45 AM EDT · Map |
| Aug 23, 2026, 1:50 PM EDT | Aug 23, 2026, 2:31 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW008 WEST STREET | Combined sewer overflow | 1.7 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record df4de27e-33c1-4c83-9c45-54c1a6e80d44, published Oct 27, 2026, 2:33 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 1:50 PM EDT · Map |
| Aug 23, 2026, 1:33 PM EDT | Aug 23, 2026, 2:31 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW008 WEST STREET | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d3b07d64-f386-432a-82d4-97008fde4da1, published Aug 23, 2026, 6:39 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 1:33 PM EDT · Map |
| Aug 23, 2026, 1:20 PM EDT | Aug 23, 2026, 2:01 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflow | 910,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 642d522c-50cd-45b0-bfdc-87e39724a3c7, published Oct 27, 2026, 2:36 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 1:20 PM EDT · Map |
| Aug 23, 2026, 1:18 PM EDT | Aug 23, 2026, 2:07 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-1 BARASFORD AVE | Combined sewer overflow | 1.48 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b01490fb-b088-4093-b385-f961d4eb2719, published Oct 27, 2026, 2:36 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 1:18 PM EDT · Map |
| Aug 23, 2026, 1:18 PM EDT | Aug 23, 2026, 2:07 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-1 BARASFORD AVE | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ad1ed527-4e93-453b-9dcd-09fe37809225, published Aug 23, 2026, 6:38 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 1:18 PM EDT · Map |
| Aug 23, 2026, 1:04 PM EDT | Aug 23, 2026, 2:01 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6423ffaa-680b-420a-8edd-dedf778fbd31, published Aug 23, 2026, 6:37 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 1:04 PM EDT · Map |
| Aug 23, 2026, 1:01 PM EDT | Aug 23, 2026, 6:13 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) dischargerevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fab1f44f-3af1-45e1-b0f7-12ff59e41b93, published Aug 23, 2026, 6:41 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 1:01 PM EDT · Map |
| Aug 23, 2026, 12:53 PM EDT | Aug 23, 2026, 1:21 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW007 BEAVER BROOK | Combined sewer overflow | 130,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 00c8298f-60a5-41f8-bdcd-ad107c125dec, published Oct 27, 2026, 2:32 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 12:53 PM EDT · Map |
| Aug 23, 2026, 12:47 PM EDT | Aug 23, 2026, 1:19 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW027 TILDEN STREET | Combined sewer overflow | 170,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d5ac37bd-be44-4dcd-b1ba-aa3fc3ff4905, published Oct 27, 2026, 2:35 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 12:47 PM EDT · Map |
| Aug 23, 2026, 12:44 PM EDT | Aug 23, 2026, 6:13 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | 4.83 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9e0e6d68-124a-41f7-9418-61fdab5b1c07, published Oct 27, 2026, 2:31 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 12:44 PM EDT · Map |
| Aug 23, 2026, 12:36 PM EDT | Aug 23, 2026, 1:21 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW007 BEAVER BROOK | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b0ce8dfe-9273-4ac9-9e78-3c4a8c5388e7, published Aug 23, 2026, 6:36 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 12:36 PM EDT · Map |
| Aug 23, 2026, 12:30 PM EDT | Aug 23, 2026, 1:19 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW027 TILDEN STREET | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d0767960-c6ef-41b8-a390-71e9b6fd7805, published Aug 23, 2026, 6:33 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 12:30 PM EDT · Map |
| Aug 23, 2026, 12:20 PM EDT | Aug 23, 2026, 12:50 PM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflow | 84,174 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8392dbeb-9535-4ecc-b7c8-854dceaa4e37, published Sep 15, 2026, 8:21 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Aug 23, 2026, 12:20 PM EDT · Map |
| Aug 23, 2026, 12:20 PM EDT | Aug 23, 2026, 12:45 PM EDT | CITY OF HAVERHILL | HAV021A MIDDLE SIPHON ESSEX ST | Combined sewer overflow | 107,295 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7c38372a-c615-47a7-8b93-a40279e09789, published Sep 15, 2026, 8:19 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Aug 23, 2026, 12:20 PM EDT · Map |
| Aug 23, 2026, 12:20 PM EDT | Aug 23, 2026, 12:25 PM EDT | CITY OF HAVERHILL | HAV041 CHESTNUT ST | Combined sewer overflow | 2,806 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 58752758-6b8a-432b-8ecd-7811d26a3ca3, published Sep 15, 2026, 8:11 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Aug 23, 2026, 12:20 PM EDT · Map |
| Aug 23, 2026, 12:20 PM EDT | Aug 23, 2026, 12:25 PM EDT | CITY OF HAVERHILL | HAV041 CHESTNUT ST | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1c5c6ee5-24b7-4a23-902a-c5e48a1b0b47, published Aug 24, 2026, 1:51 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Aug 23, 2026, 12:20 PM EDT · Map |
| Aug 23, 2026, 12:20 PM EDT | Aug 23, 2026, 12:45 PM EDT | CITY OF HAVERHILL | HAV021A MIDDLE SIPHON ESSEX ST | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f9d2e4cd-04ab-43a3-9e17-dac4845b4c7f, published Aug 24, 2026, 1:50 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Aug 23, 2026, 12:20 PM EDT · Map |
| Aug 23, 2026, 12:20 PM EDT | Aug 23, 2026, 12:50 PM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a56512b4-e6f2-4e0d-a767-0b601b5b6663, published Aug 24, 2026, 1:48 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Aug 23, 2026, 12:20 PM EDT · Map |
| Aug 23, 2026, 12:15 PM EDT | Aug 23, 2026, 12:25 PM EDT | CITY OF HAVERHILL | HAV040 BETHANY AVE | Combined sewer overflow | 5,086 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 616a76cf-7f3f-4cc1-aa86-f268d6274383, published Sep 15, 2026, 8:10 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Aug 23, 2026, 12:15 PM EDT · Map |
| Aug 23, 2026, 12:15 PM EDT | Aug 23, 2026, 12:25 PM EDT | CITY OF HAVERHILL | HAV040 BETHANY AVE | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0e27d452-50da-49c2-96fa-593a0d644132, published Aug 24, 2026, 1:52 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Aug 23, 2026, 12:15 PM EDT · Map |
| Aug 3, 2026, 10:15 AM EDT | Aug 3, 2026, 10:55 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-1 BARASFORD AVE | Combined sewer overflow | 1.13 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f98e9a88-9119-4d10-a3ab-f9bdadbd0a1a, published Oct 27, 2026, 2:28 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 3, 2026, 10:15 AM EDT · Map |
| Aug 3, 2026, 10:15 AM EDT | Aug 3, 2026, 10:55 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-1 BARASFORD AVE | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c70e2328-01b2-43f6-ba86-9dce876d2a35, published Aug 3, 2026, 4:52 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 3, 2026, 10:15 AM EDT · Map |
| Aug 3, 2026, 10:12 AM EDT | Aug 3, 2026, 12:55 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflow | 3.75 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2425026a-e4f7-4ad0-b5ad-b94aab1918df, published Oct 27, 2026, 2:29 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 3, 2026, 10:12 AM EDT · Map |
| Aug 3, 2026, 9:56 AM EDT | Aug 3, 2026, 12:55 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 930c4d40-caac-4fc1-b416-c0cea9b02c57, published Aug 3, 2026, 4:50 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 3, 2026, 9:56 AM EDT · Map |
| Aug 3, 2026, 9:20 AM EDT | Aug 3, 2026, 7:54 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | 8.36 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8d3fd946-aacb-478e-9096-cebbdfeb0297, published Oct 27, 2026, 2:27 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Aug 3, 2026, 9:20 AM EDT · Map |
| Aug 3, 2026, 9:20 AM EDT | Aug 3, 2026, 7:54 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 27936c02-0c28-4a85-b056-836703422e9c, published Aug 3, 2026, 8:05 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Aug 3, 2026, 9:20 AM EDT · Map |
| Aug 3, 2026, 9:20 AM EDT | Aug 3, 2026, 7:54 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) dischargerevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4e4be6d0-10e7-4e15-b561-8fbb32ae01a8, published Aug 3, 2026, 4:49 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Aug 3, 2026, 9:20 AM EDT · Map |
| Aug 3, 2026, 9:15 AM EDT | Aug 3, 2026, 9:33 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW027 TILDEN STREET | Combined sewer overflow | 50,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d169aada-b8de-40a8-b899-a32b2f88665c, published Oct 27, 2026, 2:27 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 3, 2026, 9:15 AM EDT · Map |
| Aug 3, 2026, 9:15 AM EDT | Aug 3, 2026, 9:33 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW027 TILDEN STREET | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0d939c84-6b2b-4166-bdf9-cdbf23ec1813, published Aug 3, 2026, 4:47 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 3, 2026, 9:15 AM EDT · Map |
| Jul 30, 2026, 3:05 AM EDT | Jul 30, 2026, 3:53 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW008 WEST STREET | Combined sewer overflow | 1.8 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3e909561-0efd-4cfb-8eb4-b788e4beccfb, published Aug 17, 2026, 2:45 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 3:05 AM EDT · Map |
| Jul 30, 2026, 3:05 AM EDT | Jul 30, 2026, 3:53 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW008 WEST STREET | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 83b054c9-c960-428b-8a40-b6748ba753af, published Aug 17, 2026, 2:44 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 3:05 AM EDT · Map |
| Jul 30, 2026, 3:03 AM EDT | Jul 30, 2026, 3:53 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW007 BEAVER BROOK | Combined sewer overflow | 540,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bc70f11d-9672-4c1f-b260-5a1666b9aef1, published Aug 17, 2026, 2:41 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 3:03 AM EDT · Map |
| Jul 30, 2026, 2:53 AM EDT | Jul 30, 2026, 3:42 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW027 TILDEN STREET | Combined sewer overflow | 750,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c64e0de3-d9a9-4521-9ad1-59e1673c7357, published Aug 17, 2026, 2:49 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 2:53 AM EDT · Map |
| Jul 30, 2026, 2:53 AM EDT | Jul 30, 2026, 3:42 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW027 TILDEN STREET | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1d6dca29-3c20-4dd2-a682-0427817443b5, published Aug 17, 2026, 2:48 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 2:53 AM EDT · Map |
| Jul 30, 2026, 2:48 AM EDT | Jul 30, 2026, 3:53 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW007 BEAVER BROOK | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e96637ba-1dea-4c4c-89ec-629e0ca00564, published Aug 17, 2026, 2:39 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 2:48 AM EDT · Map |
| Jul 30, 2026, 2:42 AM EDT | Jul 30, 2026, 4:41 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflow | 5.83 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7ddb449a-c47c-4f64-bfa2-1898d8441d87, published Aug 17, 2026, 2:53 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 2:42 AM EDT · Map |
| Jul 30, 2026, 2:42 AM EDT | Jul 30, 2026, 4:41 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6bf7aaf9-fe2f-49ce-af79-51d35f6d78a6, published Aug 17, 2026, 2:52 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 2:42 AM EDT · Map |
| Jul 30, 2026, 2:33 AM EDT | Jul 30, 2026, 4:06 AM EDT | GREATER LAWRENCE SANITARY DISTRICT | 001 | Blended (partially treated) discharge | 1.9 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 35b74d41-2a29-4384-8421-868884eb0913, published Jul 31, 2026, 6:31 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, GREATER LAWRENCE SANITARY DISTRICT, Jul 30, 2026, 2:33 AM EDT · Map |
| Jul 30, 2026, 2:33 AM EDT | Jul 30, 2026, 4:06 AM EDT | GREATER LAWRENCE SANITARY DISTRICT | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c5eccc41-d1ec-4e90-a558-02d67c9cbf62, published Jul 30, 2026, 6:20 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, GREATER LAWRENCE SANITARY DISTRICT, Jul 30, 2026, 2:33 AM EDT · Map |
| Jul 30, 2026, 2:30 AM EDT | Jul 30, 2026, 10:08 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | 4.81 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1b9b63a1-666f-45a5-9c83-a66be02319c8, published Aug 17, 2026, 2:37 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 2:30 AM EDT · Map |
| Jul 30, 2026, 2:30 AM EDT | Jul 30, 2026, 10:08 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) dischargerevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d25d6eeb-ca29-4a07-963a-63f2197192eb, published Jul 30, 2026, 10:40 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 2:30 AM EDT · Map |
| Jul 30, 2026, 2:17 AM EDT | Jul 30, 2026, 2:46 AM EDT | GREATER LAWRENCE SANITARY DISTRICT | GLSD004 ISLAND STREET | Combined sewer overflow | 314,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e177075b-585f-482b-9966-d7fe91342186, published Jul 31, 2026, 6:32 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, GREATER LAWRENCE SANITARY DISTRICT, Jul 30, 2026, 2:17 AM EDT · Map |
| Jul 30, 2026, 2:17 AM EDT | Jul 30, 2026, 2:46 AM EDT | GREATER LAWRENCE SANITARY DISTRICT | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 44a411fd-09e3-4ae8-886b-3a7abab75890, published Jul 30, 2026, 6:19 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, GREATER LAWRENCE SANITARY DISTRICT, Jul 30, 2026, 2:17 AM EDT · Map |
| Jul 30, 2026, 2:02 AM EDT | Jul 30, 2026, 3:38 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-1 BARASFORD AVE | Combined sewer overflow | 2.83 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ddb0b62b-acc9-4cab-b90b-478a53674c4c, published Aug 17, 2026, 2:51 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 2:02 AM EDT · Map |
| Jul 30, 2026, 2:02 AM EDT | Jul 30, 2026, 3:38 AM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-1 BARASFORD AVE | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4c009d6d-d830-48a3-9e94-fced4f53f30b, published Aug 17, 2026, 2:50 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 30, 2026, 2:02 AM EDT · Map |
| Jul 30, 2026, 1:35 AM EDT | Jul 30, 2026, 1:50 AM EDT | CITY OF HAVERHILL | HAV024 VARNUM ST UPPER SIPHON | Combined sewer overflow | 18,969 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4b23cc5e-ae6b-47df-a7b9-d69a6e12b764, published Aug 15, 2026, 8:38 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 1:35 AM EDT · Map |
| Jul 30, 2026, 1:35 AM EDT | Jul 30, 2026, 1:50 AM EDT | CITY OF HAVERHILL | HAV024 VARNUM ST UPPER SIPHON | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a80d4cb2-f99c-41ba-b994-4c0e791f16da, published Jul 31, 2026, 7:20 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 1:35 AM EDT · Map |
| Jul 30, 2026, 1:20 AM EDT | Jul 30, 2026, 1:35 AM EDT | CITY OF HAVERHILL | HAV013 LOWER SIPHON BUTTONWOOD AVE | Combined sewer overflow | 52,350 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7d07744c-1354-4a61-959f-f3181387b2ae, published Aug 15, 2026, 8:37 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 1:20 AM EDT · Map |
| Jul 30, 2026, 1:20 AM EDT | Jul 30, 2026, 1:35 AM EDT | CITY OF HAVERHILL | HAV013 LOWER SIPHON BUTTONWOOD AVE | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 959e72fb-f5d3-4b93-b932-46aaa5c0d514, published Jul 31, 2026, 7:21 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 1:20 AM EDT · Map |
| Jul 30, 2026, 12:55 AM EDT | Jul 30, 2026, 1:40 AM EDT | CITY OF HAVERHILL | HAV021A MIDDLE SIPHON ESSEX ST | Combined sewer overflow | 279,757 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f1bce91b-6707-49f9-af85-e75299f7d85d, published Aug 15, 2026, 8:32 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 12:55 AM EDT · Map |
| Jul 30, 2026, 12:55 AM EDT | Jul 30, 2026, 1:40 AM EDT | CITY OF HAVERHILL | HAV021A MIDDLE SIPHON ESSEX ST | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3c6a418c-8acf-4813-9b7f-9dc977343515, published Jul 31, 2026, 7:23 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 12:55 AM EDT · Map |
| Jul 30, 2026, 12:50 AM EDT | Jul 30, 2026, 1:55 AM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflow | 151,389 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e5484362-261a-4de5-8d92-c22d128d1bdd, published Aug 15, 2026, 8:35 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 12:50 AM EDT · Map |
| Jul 30, 2026, 12:50 AM EDT | Jul 30, 2026, 12:55 AM EDT | CITY OF HAVERHILL | HAV041 CHESTNUT ST | Combined sewer overflow | 1,042 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8c0a6424-1664-4010-b41e-8cfb27f98f8d, published Aug 15, 2026, 8:31 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 12:50 AM EDT · Map |
| Jul 30, 2026, 12:50 AM EDT | Jul 30, 2026, 12:55 AM EDT | CITY OF HAVERHILL | HAV040 BETHANY AVE | Combined sewer overflow | 3,285 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0c35b111-68b6-4f1e-9c6f-df25d92f9831, published Aug 15, 2026, 8:30 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 12:50 AM EDT · Map |
| Jul 30, 2026, 12:50 AM EDT | Jul 30, 2026, 12:55 AM EDT | CITY OF HAVERHILL | HAV041 CHESTNUT ST | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b352f22d-8972-4e82-ab6d-12e3875bd28c, published Jul 31, 2026, 7:27 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 12:50 AM EDT · Map |
| Jul 30, 2026, 12:50 AM EDT | Jul 30, 2026, 12:55 AM EDT | CITY OF HAVERHILL | HAV040 BETHANY AVE | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 41c51a0b-8611-4240-b63e-ee693b6689df, published Jul 31, 2026, 7:26 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 12:50 AM EDT · Map |
| Jul 30, 2026, 12:50 AM EDT | Jul 30, 2026, 1:55 AM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9c5a0655-fb7f-4a42-9774-7fc75561faeb, published Jul 31, 2026, 7:22 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 30, 2026, 12:50 AM EDT · Map |
| Jul 29, 2026, 1:23 PM EDT | Jul 29, 2026, 2:07 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflow | 750,000 gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bfb21870-b96c-43ae-8c5a-883d1f97a551, published Aug 17, 2026, 2:35 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 29, 2026, 1:23 PM EDT · Map |
| Jul 29, 2026, 1:05 PM EDT | Jul 29, 2026, 2:07 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | LOW030-2 MERRIMACK STATION | Combined sewer overflowrevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 48a2a20d-a12c-4afb-b541-e137301f2784, published Jul 30, 2026, 1:25 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 29, 2026, 1:05 PM EDT · Map |
| Jul 29, 2026, 12:40 PM EDT | Jul 29, 2026, 9:24 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) dischargerevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1776150e-6056-461a-8305-1edcaae69a5a, published Jul 30, 2026, 1:23 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 29, 2026, 12:40 PM EDT · Map |
| Jul 29, 2026, 12:35 PM EDT | Jul 29, 2026, 12:40 PM EDT | CITY OF HAVERHILL | HAV021A MIDDLE SIPHON ESSEX ST | Combined sewer overflow | 833 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a1da68ad-bb04-4850-afc3-2d46221ccf52, published Aug 15, 2026, 8:41 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 29, 2026, 12:35 PM EDT · Map |
| Jul 29, 2026, 12:35 PM EDT | Jul 29, 2026, 12:40 PM EDT | CITY OF HAVERHILL | HAV021A MIDDLE SIPHON ESSEX ST | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 307a32b8-3d63-44ce-9960-0fcb07e8f3e5, published Jul 30, 2026, 9:21 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 29, 2026, 12:35 PM EDT · Map |
| Jul 29, 2026, 12:25 PM EDT | Jul 29, 2026, 12:35 PM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflow | 7,830 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ef3f07c2-e48c-400f-9f6e-f9fa72c12b2a, published Aug 15, 2026, 8:59 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 29, 2026, 12:25 PM EDT · Map |
| Jul 29, 2026, 12:25 PM EDT | Jul 29, 2026, 12:35 PM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflow | 7,830 gal | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 398a1de7-d89d-42df-b8e1-18bb3043562c, published Aug 15, 2026, 8:29 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 29, 2026, 12:25 PM EDT · Map |
| Jul 29, 2026, 12:25 PM EDT | Jul 29, 2026, 12:35 PM EDT | CITY OF HAVERHILL | HAV034 MIDDLESEX STREET | Combined sewer overflowrevised | not reported | CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c1006c43-37fe-4edd-a82d-ce1f50d44193, published Aug 15, 2026, 8:25 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, CITY OF HAVERHILL, Jul 29, 2026, 12:25 PM EDT · Map |
| Jul 29, 2026, 12:22 PM EDT | Jul 29, 2026, 9:24 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) discharge | 6.6 million gal | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record eea0df10-5a5b-49f9-8b59-ff62fab2d03d, published Aug 17, 2026, 2:35 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 29, 2026, 12:22 PM EDT · Map |
| Jul 28, 2026, 10:14 PM EDT | Jul 28, 2026, 10:18 PM EDT | LOWELL REGIONAL WASTEWATER UTILITY | 035 | Blended (partially treated) dischargerevised | not reported | LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 02982a02-3e7e-4e3a-8826-1ef642bde720, published Jul 28, 2026, 10:20 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 10:14 PM EDT · Map |
Showing the newest 100 events of 1,911 events. See them all with filters.
Outfalls on this water
No outfall in the registry is matched to this water.
Dischargers: City of Haverhill Wastewater Department, Greater Lawrence Sanitary District, Lowell Regional Wastewater Utility.
Launches
- Merrimack River Boat Launch Newburyport
- Merrimack River Cashman Park
- Merrimack River Joppa Flats
- Merrimack River Methuen
- Merrimack River Riley Park
- Merrimack River Riverside Park
- Merrimack River Boat Launch
- Merrimack River Boat Launch Chelmsford
- Merrimack River Boat Launch Haverhill
- Merrimack River Carry in Access
Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, ODbL). · Merrimack River on OpenBoatLaunch
Sources covering this water
- ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall) · updating · last answered Nov 2, 2026, 6:54 AM EST
- ECHO NPDES Sewer Overflow and Bypass Event Dataset (eRule Phase 2, current versions) · updating · last answered Nov 2, 2026, 6:54 AM EST
- MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/) · updating · last answered Nov 2, 2026, 6:54 AM EST
- nh-permittees · updating · last answered Nov 2, 2026, 6:55 AM EST
1,911 events placed on this water in this build.