Massachusetts / Events /

Combined sewer overflow: CITY OF FALL RIVER, Sep 13, 2026

Ended (as reported) · CITY OF FALL RIVER (MassDEP sewage notification portal)

Source: CITY OF FALL RIVER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4618553a-d249-42a8-ab70-03029de33813, published Oct 7, 2026, 10:49 AM EDT, retrieved 2026-11-02 11:54 UTC · notice

1. The reported outfall

Outfall reported by CITY OF FALL RIVER (MA0100382 outfall FAL003): “CHARLES ST”. Location: 41.68495, -71.18988, from the state's or EPA's outfall layer.

2. Waters named in the notice

The notice names: “MOUNT HOPE BAY”. We place it on Narragansett Bay, MA. Matched by the outfall's ID in the outfall registry, which places each outfall on a water.

outfall MA0100382 003 (geometry, 361 m)

3. Modeled downstream reach

Not modeled: the reach model runs on rivers above the head of tide only.

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

Sep 13, 2026, 2:40 PM EDT

Ended

Sep 13, 2026, 3:20 PM EDT

Precision

Known to the minute

Reported to the source

not given

Published

Oct 7, 2026, 10:49 AM EDT

Source last updated

not given

We fetched it

2026-11-02 11:54 UTC

What and how much

Type

Combined sewer overflow

Status in the record

Ended (as reported)

Material

“CSO – UnTreated”

Volume

40,000 gal (not stated whether estimated or measured)

Volume in the source's words

“40000”

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.”

Advice window

48 hours

Basis

314 CMR 16.04(10)(g)

What it does to the map, over time

• Advisory in effect Narragansett Bay: Discharge in progress, Sep 13, 2026, 2:40 PM EDT to Sep 13, 2026, 3:20 PM EDT
• Advisory in effect Narragansett Bay: Within the authority's advice window after the discharge ended, Sep 13, 2026, 3:20 PM EDT to Sep 15, 2026, 3:20 PM EDT
• Caution Narragansett Bay: Within the site's caution window after the discharge ended (data/rules.json), Sep 15, 2026, 3:20 PM EDT to Sep 16, 2026, 3:20 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

4618553a-d249-42a8-ab70-03029de33813

Original notice

https://eeaonline.eea.state.ma.us/portal/dep/cso-data-portal/detail…

Revision of

ma-massdep:e414883e-601e-4e0a-83ec-838b74a87dd4

Revised by

no later revision

{
  "incidentId": "4618553a-d249-42a8-ab70-03029de33813",
  "incidentNumber": "26017668",
  "incidentDate": "2026-09-13T00:00:00",
  "incidentTime": "14:40",
  "amPm": null,
  "reporterClass": "Verified Data Report",
  "eventType": "CSO – UnTreated",
  "permiteeClass": "CSO",
  "permiteeName": "CITY OF FALL RIVER",
  "permiteeId": "MA0100382",
  "outfallId": "FAL003",
  "municipality": "FALL RIVER",
  "reportingType": null,
  "location": "CHARLES ST",
  "latitude": null,
  "longitude": null,
  "waterBody": "MOUNT HOPE BAY",
  "waterBodyDescription": null,
  "volumnOfEvent": "40000",
  "rainfallData": "3.27",
  "hours": "0",
  "minutes": "40",
  "month": null,
  "year": null,
  "additionalInformation": null,
  "submittedDate": "2026-10-07T10:49:27.453",
  "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 0 h 40 min (Verified Data Report)",
  "_coords": "MassDEP CSOs layer DEP_OUTFL_ FAL003 (locations are estimates)",
  "_water": {
    "echo_candidate": {
      "slug": "narragansett-bay-ma",
      "match": "geometry",
      "why_not": "geometry only, name differs"
    },
    "no_slug": [
      "MOUNT HOPE BAY (no MA slug)",
      "MOUNT HOPE BAY (no MA slug)"
    ]
  },
  "_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 26017491; start times 0 min apart"
}