Massachusetts / Events /

Combined sewer overflow: SPRINGFIELD WATER & SEWER COMMISSION, Oct 16, 2026

Ended (as reported) · SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal)

Source: SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1f3939b3-ee0b-47da-b0a9-6779f0ce1aab, published Oct 19, 2026, 8:42 AM EDT, retrieved 2026-11-02 11:54 UTC · notice

1. The reported outfall

Outfall reported by SPRINGFIELD WATER & SEWER COMMISSION (MA0101613 outfall SPR042): “SPRINGFIELD WWTP BYPASS AT BONDI'S ISLAND”. Location: 42.08809, -72.58656, from the state's or EPA's outfall layer.

2. Waters named in the notice

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

3. Modeled downstream reach

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.

• Caution 0 to 0.3 km below the outfall

  0 to 0.3 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 0.3 to 0.6 km below the outfall

  0.3 to 0.6 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 0.6 to 1.4 km below the outfall

  0.6 to 1.4 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, water from that point would typically reach here in about 1 hour (it could be as soon as under an hour) at the river flow measured at CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 1.4 to 2.8 km below the outfall

  1.4 to 2.8 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 2.8 to 4.1 km below the outfall

  2.8 to 4.1 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 4.1 to 4.6 km below the outfall

  4.1 to 4.6 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 4.6 to 6.2 km below the outfall

  4.6 to 6.2 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 6.2 to 6.3 km below the outfall

  6.2 to 6.3 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 6.3 to 7.7 km below the outfall

  6.3 to 7.7 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 7.7 to 9.3 km below the outfall

  7.7 to 9.3 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 9.3 to 9.3 km below the outfall

  9.3 to 9.3 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 9.3 to 10.5 km below the outfall

  9.3 to 10.5 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, water from that point would typically reach here in about 8 hours (it could be as soon as about 5 hours) at the river flow measured at CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 10.5 to 10.9 km below the outfall

  10.5 to 10.9 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, water from that point would typically reach here in about 8 hours (it could be as soon as about 5 hours) at the river flow measured at CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 10.9 to 11.1 km below the outfall

  10.9 to 11.1 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 11.1 to 12.2 km below the outfall

  11.1 to 12.2 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 12.2 to 17.5 km below the outfall

  12.2 to 17.5 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, 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 CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 17.5 to 20.6 km below the outfall

  17.5 to 20.6 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, water from that point would typically reach here in about 16 hours (it could be as soon as about 9 hours) at the river flow measured at CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

• Caution 20.6 to 22.6 km below the outfall

  20.6 to 22.6 km below the outfall · on Connecticut River

  If sewage entered the river at outfall 042 at Oct 16 18:50, water from that point would typically reach here in about 17 hours (it could be as soon as about 10 hours) at the river flow measured at CONNECTICUT RIVER AT THOMPSONVILLE, CT (3600 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.

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

Oct 16, 2026, 6:50 PM EDT

Ended

not reported

Precision

Known to the minute

Reported to the source

not given

Published

Oct 19, 2026, 8:42 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

not reported (not stated whether estimated or measured)

Volume in the source's words

none

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

• Caution Connecticut River: Discharge record with no status and no reported end, Oct 16, 2026, 6:50 PM EDT to Nov 2, 2026, 7:42 AM EST
• Unresolved: no end reported Connecticut River: Unresolved: no end reported, Nov 2, 2026, 7:42 AM EST to Nov 18, 2026, 7:42 AM EST
• No current report Connecticut River: Unresolved: no end reported (off the map after 30 days), Nov 18, 2026, 7:42 AM EST to Jan 14, 2027, 5:50 PM EST
• Caution Connecticut River: Discharge record with no status and no reported end, Oct 16, 2026, 6:50 PM EDT to Nov 2, 2026, 7:42 AM EST
• Unresolved: no end reported Connecticut River: Unresolved: no end reported, Nov 2, 2026, 7:42 AM EST to Nov 18, 2026, 7:42 AM EST
• No current report Connecticut River: Unresolved: no end reported (off the map after 30 days), Nov 18, 2026, 7:42 AM EST to Jan 14, 2027, 5:50 PM EST

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

1f3939b3-ee0b-47da-b0a9-6779f0ce1aab

Original notice

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

Revision of

none (first record)

Revised by

no later revision

{
  "incidentId": "1f3939b3-ee0b-47da-b0a9-6779f0ce1aab",
  "incidentNumber": "26017863",
  "incidentDate": "2026-10-16T00:00:00",
  "incidentTime": "18:50",
  "amPm": null,
  "reporterClass": "Public Notification Report",
  "eventType": "CSO – UnTreated",
  "permiteeClass": "CSO",
  "permiteeName": "SPRINGFIELD WATER & SEWER COMMISSION",
  "permiteeId": "MA0101613",
  "outfallId": "SPR042",
  "municipality": "SPRINGFIELD",
  "reportingType": "Initial-Ceased",
  "location": "SPRINGFIELD WWTP BYPASS AT BONDI'S ISLAND",
  "latitude": null,
  "longitude": null,
  "waterBody": "CONNECTICUT RIVER",
  "waterBodyDescription": null,
  "volumnOfEvent": "",
  "rainfallData": "",
  "hours": "",
  "minutes": "",
  "month": null,
  "year": null,
  "additionalInformation": null,
  "submittedDate": "2026-10-19T08:42:37.997",
  "parentIncidentId": null,
  "_report_class": "Public Notification Report",
  "_tz_assumed": "America/New_York (portal gives local clock time without zone)",
  "_ended_note": "reported ceased; the portal gives no cessation time",
  "_coords": "MassDEP CSOs layer DEP_OUTFL_ SPR042 (locations are estimates)",
  "_water": {
    "via": "crosswalk on portal waterbody",
    "text": "CONNECTICUT RIVER",
    "confidence": "high"
  },
  "_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"
}