Blended (partially treated) discharge: LOWELL REGIONAL WASTEWATER UTILITY, Aug 23, 2026

Ended (as reported) · LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal)

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 9e0e6d68-124a-41f7-9418-61fdab5b1c07, published Oct 27, 2026, 2:31 PM EDT, retrieved 2026-11-02 11:54 UTC · notice

Colours no water as of Nov 2, 2026, 6:56 AM EST: the windows on the methods page have passed, or the record has no time to count from.

A report is not a test of the water. See how statuses are worked out.

1. The reported outfall

Outfall reported by LOWELL REGIONAL WASTEWATER UTILITY (MA0100633 outfall 035). Location: 42.64845, -71.28747, given in the source record.

2. Waters named in the notice

The notice names: “MERRIMACK RIVER”. We place it on Merrimack River, MA. Matched by the name of the water in the source record.

3. Modeled downstream reach

No modeled reach for this record in this build.

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.

Open on the main map

When: three different times

The time of the event, the time the source reported, published or updated it, and the time we fetched it are kept apart. Times are shown in New England time; the record keeps the original offsets.

Started: Aug 23, 2026, 12:44 PM EDT
Ended: Aug 23, 2026, 6:13 PM EDT
Precision: Known to the minute
Reported to the source: not given
Published: Oct 27, 2026, 2:31 PM EDT
Source last updated: not given
We fetched it: 2026-11-02 11:54 UTC

What and how much

Type: Blended (partially treated) discharge
Status in the record: Ended (as reported)
Material: “Partially Treated – Blended”
Volume: 4.83 million gal (not stated whether estimated or measured)
Volume in the source's words: “4830000”

Advice

“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.”
LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) · 314 CMR 16.04(10)(g)

Advice window: 48 hours
Basis: 314 CMR 16.04(10)(g)

What it does to the map, over time

Advisory in effect Merrimack River: Discharge in progress, Aug 23, 2026, 12:44 PM EDT to Aug 23, 2026, 6:13 PM EDT
Advisory in effect Merrimack River: Within the authority's advice window after the discharge ended, Aug 23, 2026, 6:13 PM EDT to Aug 25, 2026, 6:13 PM EDT
Caution Merrimack River: Within the site's caution window after the discharge ended (data/rules.json), Aug 25, 2026, 6:13 PM EDT to Aug 26, 2026, 6:13 PM EDT

Source: intervals computed by DirtyWaterWatch (build/status.py) from this record and the rules on the methods page, as of 2026-11-02 11:56 UTC.

Source and revisions

Source: MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/)
Record id at the source: 9e0e6d68-124a-41f7-9418-61fdab5b1c07
Original notice: https://eeaonline.eea.state.ma.us/portal/dep/cso-data-portal/detail…
Revision of: ma-massdep:fab1f44f-3af1-45e1-b0f7-12ff59e41b93
Revised by: no later revision

Every field of the record

All fields of event ma-massdep:9e0e6d68-124a-41f7-9418-61fdab5b1c07
`event_id`	ma-massdep:9e0e6d68-124a-41f7-9418-61fdab5b1c07
`source_id`	ma-massdep
`source_record_id`	9e0e6d68-124a-41f7-9418-61fdab5b1c07
`parent_event_id`	ma-massdep:fab1f44f-3af1-45e1-b0f7-12ff59e41b93
`event_type`	blended
`status`	ended
`discharger_id`	ma-lowell
`discharger_name`	LOWELL REGIONAL WASTEWATER UTILITY
`npdes_permit`	MA0100633
`outfall_id`	035
`outfall_name`	null
`waterbody_text`	MERRIMACK RIVER
`water_slugs`	["merrimack-river-ma"]
`water_match`	name
`lat`	42.648448
`lon`	-71.287466
`coord_source`	source
`coord_precision_m`	null
`started_at`	2026-08-23T12:44:00-04:00
`ended_at`	2026-08-23T18:13:00-04:00
`time_precision`	minute
`reported_at`	null
`published_at`	2026-10-27T14:31:40-04:00
`source_updated_at`	null
`fetched_at`	2026-11-02T11:54:49Z
`material`	Partially Treated – Blended
`volume_gal`	4830000
`volume_text`	4830000
`estimate_flag`	unknown
`authority`	LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal)
`advice_text`	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.
`advice_window_hours`	48
`advice_window_basis`	314 CMR 16.04(10)(g)
`source_url`	https://eeaonline.eea.state.ma.us/portal/dep/cso-data-portal/details/9e0e6d68-124a-41f7-9418-61fdab5b1c07
`parse_error`	null
`fixture`	false
`file`	events/ma-massdep~3A9e0e6d68-124a-41f7-9418-61fdab5b1c07.json
`duplicate_of`	null
`placement_note`	null
`unplaced_reason`	null
`set_aside`	null
`superseded`	null
`reach`	null
`reach_band`	null

The source's record (raw)

{
  "incidentId": "9e0e6d68-124a-41f7-9418-61fdab5b1c07",
  "incidentNumber": "26017873",
  "incidentDate": "2026-08-23T00:00:00",
  "incidentTime": "12:44",
  "amPm": null,
  "reporterClass": "Verified Data Report",
  "eventType": "Partially Treated – Blended",
  "permiteeClass": "CSO",
  "permiteeName": "LOWELL REGIONAL WASTEWATER UTILITY",
  "permiteeId": "MA0100633",
  "outfallId": "035",
  "municipality": "LOWELL",
  "reportingType": null,
  "location": "Other",
  "latitude": "42.64844804",
  "longitude": "-71.28746603",
  "waterBody": "MERRIMACK RIVER",
  "waterBodyDescription": null,
  "volumnOfEvent": "4830000",
  "rainfallData": "0.34",
  "hours": "5",
  "minutes": "29",
  "month": null,
  "year": null,
  "additionalInformation": null,
  "submittedDate": "2026-10-27T14:31:40.19",
  "parentIncidentId": null,
  "_report_class": "Verified Data Report",
  "_tz_assumed": "America/New_York (portal gives local clock time without zone)",
  "_ended_at_basis": "computed: started_at + verified duration 5 h 29 min (Verified Data Report)",
  "_water": {
    "via": "crosswalk on portal waterbody",
    "text": "MERRIMACK RIVER",
    "confidence": "high"
  },
  "_volume_note": "verified by permittee, reported to MassDEP (metered or modelled not stated)",
  "_advice_source": "required wording of 314 CMR 16.04(10)(g); the permittee's own advisory is only in an attachment the portal will not serve",
  "_link_basis": "same permittee and outfall as notice 26017334; start times 17 min apart"
}

Personal fields (names, emails, phone numbers of staff) are removed from raw records before they are stored.