Treatment bypass reported — Thompson (T) Kiamesha Lake STP, Jul 29, 2026

Ended (as reported) · Thompson (T) Kiamesha Lake STP (NY DEC Sewage Pollution Right to Know)

Source: Thompson (T) Kiamesha Lake STP (NY DEC Sewage Pollution Right to Know), record 2637901804385894, reported Jul 30, 2026, 9:59 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice

Current status from this report

This report does not set a map status as of Nov 2, 2026, 4:26 PM EST. Check its dates and the status rules.

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: Thompson (T) Kiamesha Lake STP (federal wastewater discharge permit, NPDES, NY0030724). Outlet: “Filter”. Location: 41.66240, -74.66360; 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: “Kiamesha Creek”. Not linked to a mapped 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.

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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 29, 2026, 11:00 PM EDT
Ended: Jul 30, 2026, 9:30 AM EDT
Detail provided by the source: Times known to the minute
Reported to the source: Jul 30, 2026, 9:59 AM EDT
Published: Jul 30, 2026, 9:59 AM EDT
Source last updated: not given
Last retrieved by DirtyWaterWatch: 2026-11-02 20:40 UTC

What and how much

Type: Treatment bypass: wastewater skips one or more treatment steps.
Status in the record: Ended (as reported)
Material: “Partially Treated without Disinfection”
Volume: 200,000 gallons (estimated)
Volume as reported: “200000 Gallons Estimated”

Advice from Thompson (T) Kiamesha Lake STP (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: 2637901804385894
Original notice: Read the original notice
Earlier version: None: this is the first record
Later versions: None

Record details

Record details
Record identifier	ny-dec-sprtk:2637901804385894
Source identifier	ny-dec-sprtk
Source record number	2637901804385894
Earlier version	Not provided
Type	Treatment bypass
Status in the report	Ended (as reported)
Sewer operator identifier	ny-thompson-t-kiamesha-lake-stp
Sewer operator	Thompson (T) Kiamesha Lake STP
Federal wastewater discharge permit (NPDES)	NY0030724
Outlet number	Not provided
Outlet name	Filter
Water named in the report	Kiamesha Creek
Linked waters	Not provided
How this report was linked to the water	not linked to a mapped water
Latitude	41.662
Longitude	-74.664
Location source	given in the source record
Location accuracy, in metres	Not provided
Started	Jul 29, 2026, 11:00 PM EDT (2026-07-29T23:00:00-04:00)
Ended	Jul 30, 2026, 9:30 AM EDT (2026-07-30T09:30:00-04:00)
Detail provided by the source	to the minute
Reported to the source	Jul 30, 2026, 9:59 AM EDT (2026-07-30T09:59:02-04:00)
Published	Jul 30, 2026, 9:59 AM EDT (2026-07-30T09:59:02-04:00)
Source last updated	Not provided
Last retrieved by DirtyWaterWatch	Nov 2, 2026, 3:40 PM EST (2026-11-02T20:40:35Z)
Material	Partially Treated without Disinfection
Volume, in gallons	200,000
Volume as reported	200000 Gallons Estimated
How volume was determined	estimated
Authority	Thompson (T) Kiamesha Lake STP (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": "2637901804385894",
    "sprtkAirDateTime": "07/30/2026 13:59:02",
    "notificationStatus": "New",
    "facilityName": "Thompson (T) Kiamesha Lake STP NY0030724",
    "facilityId": "NY0030724",
    "countyName": "Sullivan",
    "streetNumber": "128",
    "streetName": "Rock Ridge Drive",
    "city": "Monticello",
    "addressDescription": "Wastewater Treatment Plant",
    "latitude": "-74.6636",
    "longitude": "41.6624",
    "sprtkStartDischargeDatetime": "07/30/2026 03:00:00",
    "sprtkEndDischargeDatetime": "07/30/2026 13:30:00",
    "dischargeDuration": "10.5 Hours - Ended",
    "surfaceWater": "Yes",
    "receivingWaterBody": "Kiamesha Creek",
    "componentDescription": "Filter",
    "quantity": "200000 Gallons Estimated",
    "treatedState": "Partially Treated without Disinfection",
    "dischargeDescription": "Filter was bypassed and flow was sent through the lagoon due to heavy rain.",
    "stepsToContain": "Aeration rates and mixing were adjusted to aid in settling.",
    "geoaddress": "128 Rock Ridge Dr, Monticello, NY 12701, USA",
    "impactedArea": "Unknown,Unknown -",
    "dischargeReason": "System Capacity,Weather Conditions - Heavy rainfall caused hydraulic overloading a solids washout",
    "systemComponent": "Other,Other - Filter",
    "region": "3",
    "sprtkDischargeWaterFlow": "Manmade",
    "sprtkExplanation": "Heavy rainfall caused hydraulic overloading a solids washout"
  },
  "_tab": "January 2026-August2026",
  "_row": 4667,
  "_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"
  },
  "_coords": "latitude and longitude columns swapped; a street-address geocode chosen by the notifier",
  "_event_type_basis": "partially treated discharge (treated state)",
  "_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:NY0030724|128 rock ridge drive monticello|2026-07-30T03:00Z",
    "basis": "facility + address + start",
    "position": 1,
    "of": 1,
    "head": "ny-dec-sprtk:2637901804385894",
    "latest": "ny-dec-sprtk:2637901804385894",
    "notices": [
      {
        "id": "2637901804385894",
        "status": "New",
        "aired": "2026-07-30T09:59:02-04:00"
      }
    ]
  }
}

Source: Thompson (T) Kiamesha Lake STP (NY DEC Sewage Pollution Right to Know), record 2637901804385894, reported Jul 30, 2026, 9:59 AM EDT, 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.