Combined sewer overflow (CSO) reported — Oswego (C) West Side WWTF EFMF, Jan 9, 2026

Ongoing (as reported) · Oswego (C) West Side WWTF EFMF (NY DEC Sewage Pollution Right to Know)

Source: Oswego (C) West Side WWTF EFMF (NY DEC Sewage Pollution Right to Know), record 2310797095475285, reported Jan 9, 2026, 6:44 PM EST, retrieved 2026-11-02 20:40 UTC · Read the original notice

Current status from this report

Earlier version. A later record from the same source replaces this one. The newest version sets the map status. read the newer version

A report is not a test of the water. See how we assign statuses.

Read the original notice · Report an error

1. Reported wastewater outlet

Operator named in the record: Oswego (C) West Side WWTF EFMF (federal wastewater discharge permit, NPDES, NY0029106). Outlet: “Concrete Pipe”. Location: 43.46090, -76.51330; location source: given in the source record.

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

2. Waters named in the notice

The notice names: “swego River”. DirtyWaterWatch links this report to Lake Ontario, NY. Match basis: the report's location, matched to the nearest tracked water.

3. Estimated downstream stretch

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

Map sources: water outlines and launches from OpenBoatLaunch and OpenStreetMap contributors (Open Database License); wastewater outlets from EPA and state records; downstream estimates by DirtyWaterWatch using U.S. Geological Survey maps and flow data. Base map: OpenFreeMap and OpenMapTiles.

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: Jan 9, 2026, 2:25 PM EST
Ended: ongoing, as last reported
Detail provided by the source: Times known to the minute
Reported to the source: Jan 9, 2026, 6:44 PM EST
Published: Jan 9, 2026, 6:44 PM EST
Source last updated: not given
Last retrieved by DirtyWaterWatch: 2026-11-02 20:40 UTC

What and how much

Type: Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system.
Status in the record: Ongoing (as reported)
Material: “Partially Treated with Disinfection”
Volume: 1.07 million gallons (estimated)
Volume as reported: “1,073,000 Gallons Estimated”

Advice from Oswego (C) West Side WWTF EFMF (NY DEC Sewage Pollution Right to Know)

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: NY DEC Sewage Pollution Right to Know
Source record number: 2310797095475285
Original notice: Read the original notice
Earlier version: None: this is the first record
Later versions: version 2

Record details

Record details
Record identifier	ny-dec-sprtk:2310797095475285
Source identifier	ny-dec-sprtk
Source record number	2310797095475285
Earlier version	Not provided
Type	Combined sewer overflow (CSO)
Status in the report	Ongoing (as reported)
Sewer operator identifier	ny-oswego-west
Sewer operator	Oswego (C) West Side WWTF EFMF
Federal wastewater discharge permit (NPDES)	NY0029106
Outlet number	Not provided
Outlet name	Concrete Pipe
Water named in the report	swego River
Linked waters	lake-ontario-ny
How this report was linked to the water	the report's location, matched to the nearest tracked water
Latitude	43.461
Longitude	-76.513
Location source	given in the source record
Location accuracy, in metres	Not provided
Started	Jan 9, 2026, 2:25 PM EST (2026-01-09T14:25:00-05:00)
Ended	Not provided
Detail provided by the source	to the minute
Reported to the source	Jan 9, 2026, 6:44 PM EST (2026-01-09T18:44:58-05:00)
Published	Jan 9, 2026, 6:44 PM EST (2026-01-09T18:44:58-05:00)
Source last updated	Not provided
Last retrieved by DirtyWaterWatch	Nov 2, 2026, 3:40 PM EST (2026-11-02T20:40:35Z)
Material	Partially Treated with Disinfection
Volume, in gallons	1,073,000
Volume as reported	1,073,000 Gallons Estimated
How volume was determined	estimated
Authority	Oswego (C) West Side WWTF EFMF (NY DEC Sewage Pollution Right to Know)
Advice	Not provided
Advice period, in hours	Not provided
Basis of the advice period	Not provided
Original notice	https://www.dec.ny.gov/fs/data/SPRTK_Data.xlsx

Original source data

{
  "row": {
    "notificationId": "2310797095475285",
    "sprtkAirDateTime": "01/09/2026 23:44:58",
    "notificationStatus": "New",
    "facilityName": "Oswego (C) West Side WWTF NY0029106 EFMF",
    "facilityId": "NY0029106",
    "countyName": "Oswego",
    "streetNumber": "67",
    "streetName": "West  1st Street",
    "city": "Oswego",
    "addressDescription": "Excess Flow Management Facility",
    "latitude": "-76.5133",
    "longitude": "43.4609",
    "sprtkStartDischargeDatetime": "01/09/2026 19:25:00",
    "sprtkEndDischargeDatetime": "01/10/2026 04:59:00",
    "dischargeDuration": "Appx 9.5 Hours - Ongoing",
    "surfaceWater": "Yes",
    "receivingWaterBody": "swego River",
    "componentDescription": "Concrete Pipe",
    "quantity": "1,073,000 Gallons Estimated",
    "treatedState": "Partially Treated with Disinfection",
    "dischargeDescription": "Combined Stormwater (rain+snowmelt) and Sanitary Sewage",
    "stepsToContain": "Pumping maximum flow to main treatment facility.",
    "geoaddress": "67 W 1st St, Oswego, NY 13126, USA",
    "impactedArea": "Fishing Area - West River Bank",
    "dischargeReason": "Weather Conditions - Rain and Snowmelt",
    "systemComponent": "CSO Outfall - Concrete Pipe",
    "region": "7",
    "sprtkDischargeWaterFlow": "Manmade",
    "sprtkImpactAreaDesc": "West River Bank",
    "sprtkExplanation": "Rain and Snowmelt"
  },
  "_tab": "January 2026-August2026",
  "_row": 159,
  "_time_basis": {
    "air": "UTC in the workbook (rows aired from late May 2025); converted to America/New_York",
    "start": "UTC in the workbook (rows aired from late May 2025); converted to America/New_York",
    "end": "UTC in the workbook (rows aired from late May 2025); converted to America/New_York"
  },
  "_projected_end": "2026-01-09T23:59:00-05:00",
  "_projected_end_note": "NY-Alert requires an expected end time on every notice; this one is a projection, not a reported end",
  "_coords": "latitude and longitude columns swapped; a street-address geocode chosen by the notifier",
  "_event_type_basis": "a CSO outfall named in the system component",
  "_volume_note": "first (New) notice: NY-Alert requires a volume and an end time up front, so this figure is the notifier's estimate or placeholder, not a measured total",
  "_chain": {
    "id": "key:NY0029106|67 west 1st street oswego|2026-01-09T19:25Z",
    "basis": "facility + address + start",
    "position": 1,
    "of": 2,
    "head": "ny-dec-sprtk:2310797095475285",
    "latest": "ny-dec-sprtk:2310934534379246"
  }
}

Source: Oswego (C) West Side WWTF EFMF (NY DEC Sewage Pollution Right to Know), record 2310797095475285, reported Jan 9, 2026, 6:44 PM EST, retrieved 2026-11-02 20:40 UTC · Read the original notice

Staff names, email addresses and phone numbers are removed from source data before it is stored.