Connecticut / Reports /

Sanitary sewer overflow (SSO) reported — WEST HAVEN, Jul 21, 2026

Ended (as reported) · WEST HAVEN (CT DEEP Performance Dashboard)

Source: WEST HAVEN (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11030, the source gives no report time, retrieved 2026-11-02 11:20 UTC · Read the original notice

Read the original notice · Report an error

1. Reported wastewater outlet

Operator named in the record: WEST HAVEN. Outlet: “Manhole, 17 Dawson Ave, West Haven, CT”. Location: not given in the report or in the outlet records.

Outfall: a pipe or outlet where wastewater enters a water body.

2. Waters named in the notice

The notice names: “New Haven Harbor”. DirtyWaterWatch links this report to New Haven Harbor, CT. Match basis: the water named in the report.

3. Estimated downstream stretch

We estimate routes only on rivers before they become tidal. We do not estimate routes through tidal water or lakes.

Open on the main map

When it happened and when it was reported

Event and notice times use Eastern Time (EST or EDT). Retrieval times use Coordinated Universal Time (UTC).

Started

Jul 21, 2026, 3:15 PM EDT

Ended

Jul 21, 2026, 10:30 PM EDT

Detail provided by the source

Times known to the minute

Reported to the source

not given

Published

not given

Source last updated

not given

Last retrieved by DirtyWaterWatch

2026-11-02 11:20 UTC

What and how much

Type

Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Status in the record

Ended (as reported)

Material

“Raw Sewage”

Volume

50 gallons (not stated whether estimated or measured)

Volume as reported

“50 to 100 gpm each manhole for 90 minutes so far for a total of 54,000 to 108,000 gallons.”

Advice from WEST HAVEN (CT DEEP Performance Dashboard)

This report includes no advice. Check current local health notices.

Advice period

This report does not state a period. See the rule DirtyWaterWatch applies and its source.

Basis

not stated

Source and versions

Source

CT DEEP CSO/SSO Performance Dashboard (QScend)

Source record number

11030

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "Reporting Utility": "WEST HAVEN",
  "Status": "Closed",
  "Incident Type": "Sewage Bypass",
  "Weather Conditions": "Rain 1-2\" per hour",
  "Date Bypass Began or was Discovered": "07/21/2026",
  "Event Start Time": "03:15 PM",
  "Location of Bypass": "Manhole",
  "Type of Bypass": "Raw Sewage",
  "Cause of Bypass": "Excessive Flows - Storm Event",
  "Cause of Bypass Other Explanation": null,
  "How was Incident Discovered": "Visual observation by collections crew",
  "Estimated Quantity or Rate of Discharge": "50 to 100 gpm each manhole for 90 minutes so far for a total of 54,000 to 108,000 gallons.",
  "How was estimated Quantity or Rate Determined": "average of 1\" plume height above manhole rims multiplied by 12 manholes along Ocean Ave and Dawson Ave",
  "Reach Waterbody": "Yes",
  "Request ID": "11030",
  "Waterbody Name": "New Haven Harbor",
  "Date Bypass Ended": "07/21/2026",
  "Event End Time": "10:30 PM",
  "Final Quantity": "252,000 - 504,000 gallons",
  "How was Final Volume Determined": null,
  "How incident was resolved": "rain event ended",
  "Municipality": "West Haven",
  "Address": "17 Dawson Ave, West Haven, CT",
  "_view": "SSO DATA VIEW",
  "_dww_note": [
    "receiving water 'New Haven Harbor' has no matching water record"
  ]
}