Connecticut / Events /

Sanitary sewer overflow: PLAINVILLE WPCF, Oct 30, 2026

Ongoing (as reported) · PLAINVILLE WPCF (CT DEEP Performance Dashboard)

Source: PLAINVILLE WPCF (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11641, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice

1. The reported outfall

Outfall reported by PLAINVILLE WPCF (CT0100455): “Sewer Main, 4 Carol Dr, Plainville, CT”. Location: 41.65520, -72.86550, given in the source record, precision about 11 m.

2. Waters named in the notice

The notice names: “Quinnipiac River”. We place it on Quinnipiac River, CT. 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.

• Advisory in effect 0 to 1.1 km below the outfall

  0 to 1.1 km below the outfall · on Quinnipiac River

  If sewage entered the river at outfall None at Oct 30 13:00, water from that point would typically reach here in about 1 hour (it could be as soon as under an hour) at the river's average flow (NHDPlus mean annual; no current gauge reading). 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.

• Advisory in effect 1.1 to 1.7 km below the outfall

  1.1 to 1.7 km below the outfall · on Quinnipiac River

  If sewage entered the river at outfall None at Oct 30 13:00, water from that point would typically reach here in about 2 hours (it could be as soon as under an hour) at the river's average flow (NHDPlus mean annual; no current gauge reading). 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.

• Advisory in effect 1.7 to 2 km below the outfall

  1.7 to 2 km below the outfall · on Quinnipiac River

  If sewage entered the river at outfall None at Oct 30 13:00, water from that point would typically reach here in about 2 hours (it could be as soon as about 1 hour) at the river's average flow (NHDPlus mean annual; no current gauge reading). 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.

• Advisory in effect 2 to 10.1 km below the outfall

  2 to 10.1 km below the outfall · on Quinnipiac River

  If sewage entered the river at outfall None at Oct 30 13:00, water from that point would typically reach here in about 10 hours (it could be as soon as about 6 hours) at the river's average flow (NHDPlus mean annual; no current gauge reading). 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.

• Advisory in effect 10.1 to 14.1 km below the outfall

  10.1 to 14.1 km below the outfall · on Quinnipiac River

  If sewage entered the river at outfall None at Oct 30 13:00, water from that point would typically reach here in about 14 hours (it could be as soon as about 8 hours) at the river's average flow (NHDPlus mean annual; no current gauge reading). 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.

• Advisory in effect 14.1 to 15.4 km below the outfall

  14.1 to 15.4 km below the outfall · on Quinnipiac River

  If sewage entered the river at outfall None at Oct 30 13:00, water from that point would typically reach here in about 15 hours (it could be as soon as about 8 hours) at the river's average flow (NHDPlus mean annual; no current gauge reading). 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.

• Advisory in effect 15.4 to 18.3 km below the outfall

  15.4 to 18.3 km below the outfall · on Quinnipiac River

  If sewage entered the river at outfall None at Oct 30 13:00, water from that point would typically reach here in about 17 hours (it could be as soon as about 10 hours) at the river's average flow (NHDPlus mean annual; no current gauge reading). 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.

• Advisory in effect 18.3 to 21.4 km below the outfall

  18.3 to 21.4 km below the outfall · on Quinnipiac River

  If sewage entered the river at outfall None at Oct 30 13:00, water from that point would typically reach here in about 20 hours (it could be as soon as about 11 hours) at the river's average flow (NHDPlus mean annual; no current gauge reading). 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.

• Advisory in effect 21.4 to 23.7 km below the outfall

  21.4 to 23.7 km below the outfall · on Quinnipiac River

  If sewage entered the river at outfall None at Oct 30 13:00, water from that point would typically reach here in about 22 hours (it could be as soon as about 12 hours) at the river's average flow (NHDPlus mean annual; no current gauge reading). 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: lake or bay 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 30, 2026, 1:00 PM EDT

Ended

ongoing, as last reported

Precision

Known to the minute

Reported to the source

not given

Published

not given

Source last updated

not given

We fetched it

2026-11-02 11:53 UTC

What and how much

Type

Sanitary sewer overflow

Status in the record

Ongoing (as reported)

Material

“Raw Sewage”

Volume

“Ongoing - TBD” (not stated whether estimated or measured)

Volume in the source's words

“Ongoing - TBD”

Advice

The record carries no advice text from PLAINVILLE WPCF (CT DEEP Performance Dashboard).

Advice window

not stated in the record; the state's window on the methods page applies

Basis

not stated

What it does to the map, over time

• Advisory in effect Quinnipiac River: Discharge ongoing (no end reported yet), Oct 30, 2026, 1:00 PM EDT to Nov 6, 2026, 12:00 PM EST
• Unresolved: no end reported Quinnipiac River: Unresolved: no end reported, Nov 6, 2026, 12:00 PM EST to Nov 29, 2026, 12:00 PM EST
• No current report Quinnipiac River: Unresolved: no end reported (off the map after 30 days), Nov 29, 2026, 12:00 PM EST to Jan 28, 2027, 12:00 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

CT DEEP CSO/SSO Performance Dashboard (QScend)

Record id at the source

11641

Original notice

https://deepct.qscend.mygovcenter.com/cms/cms?id=1

Revision of

none (first record)

Revised by

no later revision

{
  "Reporting Utility": "PLAINVILLE WPCF",
  "Status": "Open",
  "Incident Type": "Sewage Bypass",
  "Weather Conditions": "Dry",
  "Date Bypass Began or was Discovered": "10/30/2026",
  "Event Start Time": "01:00 PM",
  "Location of Bypass": "Sewer Main",
  "Type of Bypass": "Raw Sewage",
  "Cause of Bypass": "Other",
  "Cause of Bypass Other Explanation": "80,000 gallons",
  "How was Incident Discovered": null,
  "Estimated Quantity or Rate of Discharge": "Ongoing - TBD",
  "How was estimated Quantity or Rate Determined": null,
  "Reach Waterbody": "Yes",
  "Request ID": "11641",
  "Waterbody Name": "Quinnipiac River",
  "Date Bypass Ended": null,
  "Event End Time": null,
  "Final Quantity": null,
  "How was Final Volume Determined": null,
  "How incident was resolved": null,
  "Municipality": "Plainville",
  "Address": "4 Carol Dr, Plainville, CT",
  "_view": "SSO DATA VIEW",
  "_dww_note": [
    "'quinnipiac-river-hamden-ct' is a reach record for ['hamden', 'milldale', 'new haven', 'north haven']; the event's town 'Plainville' is not one of them: not used",
    "receiving water 'Quinnipiac River' has no matching water record"
  ],
  "_map_point": {
    "lat": 41.6552,
    "lon": -72.8655,
    "chart": "Open SSO Bypasses by Location"
  }
}