Lowell Regional Wastewater Utility
CSO · Massachusetts · Lowell, Chelmsford, Dracut, Tewksbury, Tyngsborough
- NPDES permit
- MA0100633
- Outfalls
- 9 with coordinates in the registry
- Receiving waters
- BEAVER BROOK; CONCORD RIVER; MERIMACK RIVER; MERRIMACK RIVER
- Tracked waters
- Concord River, MA, Merrimack River, MA
- Events tracked
- 863 discharges · latest Oct 16, 2026, 11:05 AM EDT
- Volume reported
- 4,145,684,398 gallons across the 674 discharges that give a volume (189 without one)
Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 863 event records below, as of 2026-11-02 11:56 UTC.
How it tells the public
Lowell CSO page https://www.lowellma.gov/1287/Combined-Sewer-Overflows-CSO with sign-up (per MRWC page): three emails per event (start, end, volume follow-up). MassDEP portal: 1,425 rows, latest 2026-10-16; median 6.6 h.
Source: the project's research on each operator's notification channel (research/<state>/dischargers.json), checked by fetching the operator's pages.
Outfalls
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.
9 outfalls in the registry
- 002 SDS#1: Walker Station · CSO · Merrimack River
- 007 SDS#2: BEAVER BROOK · CSO · Lower Beaver Brook
- 008 SDS#3: WEST STREET · CSO · Merrimack River
- 011 SDS#4: READ STREET · CSO · Merrimack River
- 012 SDS#5: FIRST STREET DIVERSION STRUCTURE · CSO · Merrimack River
- 020 SDS#6: WARREN STREET · CSO · Concord River
- 027 SDS#7: TILDEN STREET · CSO · Merrimack River
- 0301 SDS#8: BARASFORD AVE · CSO · Merrimack River
- 0302 MERRIMACK STATION · CSO · Merrimack River
Source: EPA ECHO CSO outfall inventory matched to waters (data/outfalls-ne.json).
Event history
| Start | End | Water | Outfall | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| Oct 16, 2026, 11:05 AM EDT | ended, time not reported | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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, 9:57 PM EDT | ended, time not reported | Merrimack River, MA | 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, 4:39 AM EDT | ended, time not reported | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 17, 2026, 9:55 PM EDT | Sep 17, 2026, 11:46 PM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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, 1:25 PM EDT | ended, time not reported | Merrimack River, MA | 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, 11:11 AM EDT | Sep 13, 2026, 3:31 PM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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, 10:50 AM EDT | Sep 13, 2026, 11:01 AM EDT | Concord River, MA | LOW020 WARREN 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 cf8a9112-a571-4f25-aa48-2d49acf2f074, published Sep 13, 2026, 8:05 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 10:50 AM EDT · Map |
| Sep 13, 2026, 10:47 AM EDT | Sep 13, 2026, 11:21 AM EDT | Merrimack River, MA | 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, 10:43 AM EDT | Sep 13, 2026, 11:01 AM EDT | Concord River, MA | LOW020 WARREN STREET | Combined sewer overflow | 290,000 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 721f0e7f-067f-4488-b0f4-13baacbf0086, published Oct 27, 2026, 2:41 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Sep 13, 2026, 10:43 AM EDT · Map |
| Sep 13, 2026, 10:13 AM EDT | Sep 13, 2026, 6:36 PM EDT | Merrimack River, MA | 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 |
| Aug 23, 2026, 1:50 PM EDT | Aug 23, 2026, 2:31 PM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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, 12:48 PM EDT | Aug 23, 2026, 1:04 PM EDT | Concord River, MA | LOW020 WARREN STREET | Combined sewer overflow | 290,000 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 a4d011cb-5fa5-438b-8a70-0b6544ad9ca2, published Oct 27, 2026, 2:34 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 12:48 PM EDT · Map |
| Aug 23, 2026, 12:47 PM EDT | Aug 23, 2026, 1:19 PM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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, 12:32 PM EDT | Aug 23, 2026, 1:04 PM EDT | Concord River, MA | LOW020 WARREN 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 2958e836-e931-40dc-b1f7-366ea09ed6a6, published Aug 23, 2026, 6:35 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026, 12:32 PM EDT · Map |
| Aug 23, 2026, 12:30 PM EDT | Aug 23, 2026, 1:19 PM EDT | Merrimack River, MA | 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 3, 2026, 10:15 AM EDT | Aug 3, 2026, 10:55 AM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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, 3:27 AM EDT | Concord River, MA | LOW020 WARREN STREET | Combined sewer overflow | 290,000 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 95d47a70-3bee-4a6b-b88f-530fc19aed0b, published Aug 17, 2026, 2:46 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, 2:48 AM EDT | Jul 30, 2026, 3:27 AM EDT | Concord River, MA | LOW020 WARREN 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 0f5f96fb-ea6b-455a-8879-39cbbfc6c57f, published Aug 17, 2026, 2:46 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, 2:48 AM EDT | Jul 30, 2026, 3:53 AM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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, 2:30 AM EDT | Jul 30, 2026, 10:08 AM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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, 2:02 AM EDT | Jul 30, 2026, 3:38 AM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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 29, 2026, 1:23 PM EDT | Jul 29, 2026, 2:07 PM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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 | Merrimack River, MA | 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, 12:22 PM EDT | Jul 29, 2026, 9:24 PM EDT | Merrimack River, MA | 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 | Merrimack River, MA | 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 |
| Jul 28, 2026, 6:00 PM EDT | Jul 28, 2026, 6:10 PM EDT | Merrimack River, MA | 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 2805214d-cae9-478b-a93b-aea60af4e538, published Jul 28, 2026, 10:24 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 6:00 PM EDT · Map |
| Jul 28, 2026, 4:56 PM EDT | Jul 28, 2026, 4:44 PM EDT | Merrimack River, MA | 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 e3ff3633-73fd-4d04-aa77-538a53cf397e, published Jul 28, 2026, 10:25 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 4:56 PM EDT · Map |
| Jul 28, 2026, 4:17 PM EDT | Jul 28, 2026, 4:19 PM EDT | Merrimack River, MA | 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 29e38fd7-8f62-4146-9665-b17419a417ef, published Jul 28, 2026, 10:22 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 4:17 PM EDT · Map |
| Jul 28, 2026, 4:16 PM EDT | Jul 28, 2026, 6:10 PM EDT | Merrimack River, MA | LOW030-2 MERRIMACK STATION | Combined sewer overflow | 3.31 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 09d0fffc-5df7-4d0f-b0a5-3f4e7d34771a, published Aug 17, 2026, 2:34 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 4:16 PM EDT · Map |
| Jul 28, 2026, 4:16 PM EDT | Jul 28, 2026, 4:44 PM EDT | Merrimack River, MA | LOW030-1 BARASFORD AVE | Combined sewer overflow | 790,000 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 30171adb-9670-4b81-a17b-3a1447f3b01f, published Aug 17, 2026, 2:33 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 4:16 PM EDT · Map |
| Jul 28, 2026, 4:07 PM EDT | Jul 28, 2026, 4:20 PM EDT | Merrimack River, MA | 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 922712c4-292d-4e57-8f81-13b55d042b05, published Jul 28, 2026, 10:23 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 4:07 PM EDT · Map |
| Jul 28, 2026, 3:55 PM EDT | Jul 28, 2026, 4:06 PM EDT | Concord River, MA | LOW020 WARREN 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 d042b69a-9f57-483b-b7c8-07b9925048cb, published Jul 28, 2026, 10:21 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 3:55 PM EDT · Map |
| Jul 28, 2026, 3:45 PM EDT | Jul 28, 2026, 10:18 PM EDT | Merrimack River, MA | 035 | Blended (partially treated) discharge | 5.62 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 038d74ed-78ed-4372-8365-876a2461acf9, published Aug 17, 2026, 2:28 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 3:45 PM EDT · Map |
| Jul 28, 2026, 3:42 PM EDT | Jul 28, 2026, 4:20 PM EDT | Merrimack River, MA | LOW027 TILDEN STREET | Combined sewer overflow | 650,000 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 95a0eef4-1cc6-460d-a68f-74d538f5a0e3, published Aug 17, 2026, 2:32 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 3:42 PM EDT · Map |
| Jul 28, 2026, 3:38 PM EDT | Jul 28, 2026, 4:19 PM EDT | Merrimack River, MA | LOW007 BEAVER BROOK | Combined sewer overflow | 760,000 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 67ae186f-e6d3-46d8-b0d4-c88ae8d70d11, published Aug 17, 2026, 2:29 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 3:38 PM EDT · Map |
| Jul 28, 2026, 3:35 PM EDT | Jul 28, 2026, 4:06 PM EDT | Concord River, MA | LOW020 WARREN STREET | 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 c0c0639f-4e44-4e5e-bbd7-68fda7460d2d, published Aug 17, 2026, 2:30 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 3:35 PM EDT · Map |
| Jul 28, 2026, 3:14 PM EDT | Jul 28, 2026, 3:17 PM EDT | “Eagle Court overflow into Pawtucket Canal” (not placed) | not stated | Sanitary sewer overflow | 85 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 755607c0-242b-4f8a-b1b5-ceaaa58c3cac, published Aug 17, 2026, 2:55 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 3:14 PM EDT |
| Jul 28, 2026, 3:14 PM EDT | ended, time not reported | “Eagle Court overflow into Pawtucket Canal” (not placed) | not stated | Sanitary 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 2ade3649-b963-4511-b1ce-7c61dc977a51, published Jul 29, 2026, 11:35 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 28, 2026, 3:14 PM EDT |
| Jul 21, 2026, 7:31 PM EDT | Jul 21, 2026, 11:59 PM EDT | Merrimack River, MA | 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 291221ad-4b0d-4de6-b5b0-26578ead5cbc, published Jul 22, 2026, 1:01 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 7:31 PM EDT · Map |
| Jul 21, 2026, 7:19 PM EDT | Jul 21, 2026, 8:05 PM EDT | Merrimack River, MA | LOW030-1 BARASFORD AVE | Combined sewer overflow | 1.28 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 2a316ce2-89ff-4922-9fb8-267becdf58fa, published Aug 17, 2026, 2:25 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 7:19 PM EDT · Map |
| Jul 21, 2026, 7:14 PM EDT | Jul 21, 2026, 11:59 PM EDT | Merrimack River, MA | 035 | Blended (partially treated) discharge | 3.87 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 952b1d8a-42fa-4157-9547-1b9f804af115, published Aug 17, 2026, 2:22 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 7:14 PM EDT · Map |
| Jul 21, 2026, 7:10 PM EDT | Jul 21, 2026, 8:09 PM EDT | Merrimack River, MA | LOW030-2 MERRIMACK STATION | Combined sewer overflow | 3.06 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 cb75729e-b858-4266-9d38-093c818208ce, published Aug 17, 2026, 2:26 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 7:10 PM EDT · Map |
| Jul 21, 2026, 6:58 PM EDT | Jul 21, 2026, 8:09 PM EDT | Merrimack River, MA | 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 2d629e23-ceb7-4648-981b-789a7482778e, published Jul 22, 2026, 1:13 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 6:58 PM EDT · Map |
| Jul 21, 2026, 6:57 PM EDT | Jul 21, 2026, 7:37 PM EDT | Merrimack River, MA | LOW027 TILDEN STREET | Combined sewer overflow | 400,000 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 24057fa0-4123-49f4-8e57-e1d392830367, published Aug 17, 2026, 2:24 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 6:57 PM EDT · Map |
| Jul 21, 2026, 6:46 PM EDT | Jul 21, 2026, 6:59 PM EDT | Concord River, MA | LOW020 WARREN STREET | Combined sewer overflow | 100,000 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 a46a27e8-0e6f-4491-8588-f4f5eb826840, published Aug 17, 2026, 2:23 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 6:46 PM EDT · Map |
| Jul 21, 2026, 6:45 PM EDT | Jul 21, 2026, 7:37 PM EDT | Merrimack River, MA | 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 90ace84b-34a3-4611-9035-5321b3702634, published Jul 22, 2026, 1:09 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 6:45 PM EDT · Map |
| Jul 21, 2026, 6:33 PM EDT | Jul 21, 2026, 8:05 PM EDT | Merrimack River, MA | 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 998a535e-3ce7-4528-8c0d-13d133d06e90, published Jul 22, 2026, 1:11 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 6:33 PM EDT · Map |
| Jul 21, 2026, 6:30 PM EDT | Jul 21, 2026, 6:59 PM EDT | Concord River, MA | LOW020 WARREN 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 e6adc72e-0485-4f90-a9f1-a7eb7951c052, published Jul 22, 2026, 1:08 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 21, 2026, 6:30 PM EDT · Map |
| Jul 7, 2026, 6:31 PM EDT | Jul 7, 2026, 6:59 PM EDT | Merrimack River, MA | 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 051d9b93-512a-4049-962a-d9eef0ab56ce, published Jul 7, 2026, 8:32 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 7, 2026, 6:31 PM EDT · Map |
| Jul 7, 2026, 6:18 PM EDT | Jul 7, 2026, 6:59 PM EDT | Merrimack River, MA | LOW030-1 BARASFORD AVE | Combined sewer overflow | 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 5cfd0c2e-a213-42d0-8e96-44a61e448ab3, published Aug 17, 2026, 2:12 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 7, 2026, 6:18 PM EDT · Map |
| Jul 7, 2026, 5:23 PM EDT | Jul 7, 2026, 7:25 PM EDT | Merrimack River, MA | LOW030-2 MERRIMACK STATION | Combined sewer overflow | 1.74 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 931a552b-49b7-47a7-848f-cb000a415e38, published Aug 17, 2026, 2:13 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 7, 2026, 5:23 PM EDT · Map |
| Jul 7, 2026, 5:11 PM EDT | Jul 7, 2026, 7:25 PM EDT | Merrimack River, MA | 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 f64eb897-087c-4062-bbed-b1584c6cd023, published Jul 7, 2026, 8:31 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jul 7, 2026, 5:11 PM EDT · Map |
| Jul 7, 2026, 2:15 PM EDT | Jul 7, 2026, 8:36 PM EDT | Merrimack River, MA | 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 4ff99202-cb95-46ae-bbce-7fd3886d45fe, published Jul 7, 2026, 8:34 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 7, 2026, 2:15 PM EDT · Map |
| Jul 7, 2026, 2:13 PM EDT | Jul 7, 2026, 8:36 PM EDT | Merrimack River, MA | 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 0859f984-ce70-4922-9f56-437a7918470f, published Jul 8, 2026, 1:22 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 7, 2026, 2:13 PM EDT · Map |
| Jul 7, 2026, 7:20 AM EDT | Jul 7, 2026, 8:36 PM EDT | Merrimack River, MA | 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 64a89bba-56e3-49fc-a48d-5266450ae13c, published Jul 7, 2026, 1:19 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 7, 2026, 7:20 AM EDT · Map |
| Jul 7, 2026, 7:03 AM EDT | Jul 7, 2026, 8:36 PM EDT | Merrimack River, MA | 035 | Blended (partially treated) discharge | 30.8 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 1e14f7ba-95a0-4b54-a5fa-4f1b626a9999, published Aug 17, 2026, 2:10 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jul 7, 2026, 7:03 AM EDT · Map |
| Jun 26, 2026, 9:50 PM EDT | Jun 26, 2026, 11:57 PM EDT | Merrimack River, MA | 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 0d5e75ba-dce3-4014-b1e5-869e05f3ca98, published Jun 27, 2026, 2:56 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jun 26, 2026, 9:50 PM EDT · Map |
| Jun 26, 2026, 9:34 PM EDT | Jun 26, 2026, 11:57 PM EDT | Merrimack River, MA | 035 | Blended (partially treated) discharge | 3.05 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 90770920-a70f-4227-9024-1439decf7787, published Jul 15, 2026, 1:23 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Jun 26, 2026, 9:34 PM EDT · Map |
| Jun 23, 2026, 8:33 AM EDT | Jun 23, 2026, 9:26 AM EDT | Merrimack River, MA | LOW030-2 MERRIMACK STATION | Combined sewer overflow | 2.07 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 659a842d-f4b3-4d70-9e15-e94c701dfa9b, published Jul 15, 2026, 1:20 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jun 23, 2026, 8:33 AM EDT · Map |
| Jun 23, 2026, 8:30 AM EDT | Jun 23, 2026, 8:43 AM EDT | Merrimack River, MA | 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 aea2d8ae-bd44-4aa2-84d8-a020cc76d9fb, published Jun 23, 2026, 2:37 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jun 23, 2026, 8:30 AM EDT · Map |
| Jun 23, 2026, 8:30 AM EDT | Jun 23, 2026, 8:43 AM EDT | Merrimack River, MA | 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 2bb1530a-bda4-46c5-a973-f620060ecc58, published Jun 23, 2026, 2:35 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jun 23, 2026, 8:30 AM EDT · Map |
| Jun 23, 2026, 8:20 AM EDT | Jun 23, 2026, 9:26 AM EDT | Merrimack River, MA | 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 e33c030e-3551-4283-a7ec-153cb0351487, published Jun 23, 2026, 2:33 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Jun 23, 2026, 8:20 AM EDT · Map |
Showing the newest 100 events of 1,425 events. See them all with filters.
History
- Discharge events, last 12 months78Dec 2025 to Nov 2026
- Days with a discharge, last 12 months30Dec 2025 to Nov 2026
- Hours under advisory, last 12 months1,194Dec 2025 to Nov 2026; on this discharger's reports
- 2026 season under advisory19%May to October; 853 h
Discharge events per month
679 events, Jan 2022 to Nov 2026. Counted from 674 verified or annual reports, 5 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 2022-05. 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 | No source | |
| Jun 2022 | 0 | 0 | 0 | 0 | Partly covered or sparse source | |
| Jul 2022 | 16 | 0 | 2 | 18 | Verified or annual reports | |
| Aug 2022 | 0 | 0 | 1 | 1 | Verified or annual reports | |
| Sep 2022 | 21 | 0 | 5 | 26 | Verified or annual reports | |
| Oct 2022 | 13 | 0 | 2 | 15 | Verified or annual reports | |
| Nov 2022 | 6 | 0 | 4 | 10 | Verified or annual reports | |
| Dec 2022 | 7 | 0 | 3 | 10 | Verified or annual reports | |
| Jan 2023 | 3 | 0 | 5 | 8 | Verified or annual reports | |
| Feb 2023 | 0 | 0 | 0 | 0 | ||
| Mar 2023 | 4 | 0 | 2 | 6 | Verified or annual reports | |
| Apr 2023 | 10 | 0 | 3 | 13 | Verified or annual reports | |
| May 2023 | 9 | 0 | 3 | 12 | Verified or annual reports | |
| Jun 2023 | 34 | 6 | 9 | 49 | Verified or annual reports | |
| Jul 2023 | 43 | 10 | 11 | 64 | Verified or annual reports | |
| Aug 2023 | 35 | 10 | 6 | 51 | Verified or annual reports | |
| Sep 2023 | 22 | 2 | 7 | 31 | Verified or annual reports | |
| Oct 2023 | 6 | 0 | 1 | 7 | Verified or annual reports | |
| Nov 2023 | 4 | 0 | 1 | 5 | Verified or annual reports | |
| Dec 2023 | 14 | 0 | 7 | 21 | Verified or annual reports | |
| Jan 2024 | 14 | 1 | 5 | 20 | Verified or annual reports | |
| Feb 2024 | 0 | 0 | 1 | 1 | Verified or annual reports | |
| Mar 2024 | 25 | 0 | 6 | 31 | Verified or annual reports | |
| Apr 2024 | 7 | 0 | 4 | 11 | Verified or annual reports | |
| May 2024 | 7 | 0 | 4 | 11 | Verified or annual reports | |
| Jun 2024 | 3 | 0 | 2 | 5 | Verified or annual reports | |
| Jul 2024 | 10 | 0 | 4 | 14 | Verified or annual reports | |
| Aug 2024 | 27 | 5 | 5 | 37 | 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 | 10 | 0 | 2 | 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 | 3 | 10 | Verified or annual reports | |
| Apr 2025 | 4 | 0 | 4 | 8 | Verified or annual reports | |
| May 2025 | 9 | 0 | 7 | 16 | Verified or annual reports | |
| Jun 2025 | 10 | 0 | 2 | 12 | Verified or annual reports | |
| Jul 2025 | 11 | 5 | 5 | 21 | Verified or annual reports | |
| Aug 2025 | 2 | 0 | 1 | 3 | Verified or annual reports | |
| Sep 2025 | 3 | 0 | 4 | 7 | Verified or annual reports | |
| Oct 2025 | 11 | 0 | 3 | 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 | 5 | 0 | 1 | 6 | Verified or annual reports | |
| May 2026 | 1 | 0 | 3 | 4 | Verified or annual reports | |
| Jun 2026 | 8 | 0 | 5 | 13 | Verified or annual reports | |
| Jul 2026 | 18 | 1 | 5 | 24 | Verified or annual reports | |
| Aug 2026 | 9 | 0 | 2 | 11 | Verified or annual reports | |
| Sep 2026 | 5 | 0 | 3 | 8 | Verified or annual reports | |
| Oct 2026 | 3 | 0 | 2 | 5 | Public notices (no report yet) | |
| Nov 2026 | 0 | 0 | 0 | 0 |
Hours under advisory per month
Hours this discharger's reports put a water 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 2022-05. 5 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. Official beach and cyanobacteria advisories are counted on water pages only. 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 | No source |
| Jun 2022 | 0 | 0 | 720 | Partly covered or sparse source |
| Jul 2022 | 105 | 105 | 744 | |
| Aug 2022 | 51 | 51 | 744 | |
| Sep 2022 | 245 | 245 | 720 | |
| Oct 2022 | 113 | 113 | 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 | 141 | 141 | 720 | |
| May 2023 | 208 | 208 | 744 | |
| Jun 2023 | 365 | 365 | 720 | |
| Jul 2023 | 490 | 490 | 744 | |
| Aug 2023 | 359 | 359 | 744 | |
| Sep 2023 | 352 | 352 | 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 | 191 | 191 | 744 | |
| Jun 2024 | 139 | 139 | 720 | |
| Jul 2024 | 147 | 147 | 744 | |
| Aug 2024 | 304 | 304 | 744 | |
| Sep 2024 | 0 | 0 | 720 | |
| Oct 2024 | 0 | 0 | 744 | |
| Nov 2024 | 121 | 121 | 720 | |
| Dec 2024 | 128 | 128 | 744 | |
| Jan 2025 | 111 | 111 | 744 | |
| Feb 2025 | 267 | 267 | 672 | |
| Mar 2025 | 171 | 171 | 744 | |
| Apr 2025 | 205 | 205 | 720 | |
| May 2025 | 316 | 316 | 744 | |
| Jun 2025 | 87 | 87 | 720 | |
| Jul 2025 | 192 | 192 | 744 | |
| Aug 2025 | 121 | 121 | 744 | |
| Sep 2025 | 133 | 133 | 720 | |
| Oct 2025 | 125 | 125 | 744 | |
| Nov 2025 | 136 | 136 | 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 | 157 | 157 | 744 | |
| Jun 2026 | 218 | 218 | 720 | |
| Jul 2026 | 196 | 196 | 744 | |
| Aug 2026 | 122 | 122 | 744 | |
| Sep 2026 | 160 | 160 | 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 2022-05.
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 | No source |
| Jun 2022 | 0 | Partly covered or sparse source |
| Jul 2022 | 3 | |
| 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 | 3 | |
| May 2023 | 5 | |
| Jun 2023 | 12 | |
| Jul 2023 | 13 | |
| Aug 2023 | 8 | |
| 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 | 5 | |
| Jun 2024 | 3 | |
| Jul 2024 | 4 | |
| 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 | 5 | |
| May 2025 | 10 | |
| Jun 2025 | 2 | |
| Jul 2025 | 6 | |
| Aug 2025 | 2 | |
| Sep 2025 | 3 | |
| Oct 2025 | 4 | |
| Nov 2025 | 3 | |
| Dec 2025 | 4 | |
| Jan 2026 | 0 | |
| Feb 2026 | 0 | |
| Mar 2026 | 3 | |
| Apr 2026 | 2 | |
| May 2026 | 3 | |
| Jun 2026 | 5 | |
| Jul 2026 | 5 | |
| Aug 2026 | 2 | |
| Sep 2026 | 4 | |
| Oct 2026 | 2 | |
| Nov 2026 | 0 |
Reported volume per year
Gallons, summed from the 674 events that gave a number (5 did not).
- Partly covered or sparse source
5 of 679 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 | 318,470,000 | 80 | 0 | Partly covered or sparse source |
| 2023 | 1,762,563,547 | 267 | 0 | |
| 2024 | 1,238,870,408 | 147 | 0 | |
| 2025 | 592,461,988 | 111 | 0 | |
| 2026 | 233,318,455 | 69 | 5 |
Hours under advisory per year
Hours under advisory each year; 2026 to date.
- Advisory in effect
- Partly covered or sparse source
5 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. Official beach and cyanobacteria advisories are counted on water pages only.
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 | 923 | 10.5% | Partly covered or sparse source |
| 2023 | 2,945 | 33.6% | |
| 2024 | 2,145 | 24.4% | |
| 2025 | 2,025 | 23.1% | |
| 2026 | 1,033 | 14.1% |
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 | 33 | 4 |
| Feb | 6 | 4 |
| Mar | 50 | 4 |
| Apr | 38 | 4 |
| May | 43 | 4 |
| Jun | 79 | 5 |
| Jul | 141 | 5 |
| Aug | 103 | 5 |
| Sep | 72 | 5 |
| Oct | 41 | 5 |
| Nov | 26 | 5 |
| Dec | 47 | 4 |
Discharge events by outfall
The 9 outfalls with the most events of 9, 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 | Events |
|---|---|
| 035 | 174 |
| LOW030-2 MERRIMACK STATION | 83 |
| LOW027 TILDEN STREET | 78 |
| LOW008 WEST STREET | 74 |
| LOW020 WARREN STREET | 68 |
| LOW030-1 BARASFORD AVE | 63 |
| LOW007 BEAVER BROOK | 58 |
| LOW002 WALKER STREET | 27 |
| LOW011 READ STREET | 14 |
| Outfall not stated | 40 |
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.
- MassDEP sewage notification portal: 2022-06-30 to now