Kerhonkson WWTF
Ellenville, NY · Ulster County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- 0.13 MGD
- NPDES permit
- NY0109924
- Effective
- Permit expires
- November 2027
- Population served
- 697
- CWNS 2022
Kerhonkson WWTF is a publicly owned wastewater treatment works in Ellenville, Ulster County, New York treating an average of 0.02 million gallons per day against a permitted design capacity of 0.13 MGD, serving about 697 residents. It discharges under NPDES permit NY0109924 (effective), which expires in November 2027, with 1 recorded violation in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Kerhonkson WWTF.
No verified contacts on file yet
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Nearby wastewater treatment plants in New York
Napanoch · 3 mi away
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Ellenville · 5 mi away
0.3 MGD
Gardiner · 10 mi away
0.04 MGD
Pine Bush · 11 mi away
0.2 MGD
New Paltz · 11 mi away
0.57 MGD
New Paltz · 13 mi away
0.0081 MGD
Rosendale · 13 mi away
0.06 MGD
Grahamsville · 13 mi away
0.07 MGD
Kerhonkson WWTF: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated November 28, 2025.