Herrings STP
Carthage, NY · Jefferson County · Publicly Owned Treatment Works
- Average flow
- 0.0053 MGD
- Design flow
- 0.01 MGD
- NPDES permit
- NY0236306
- Effective
- Permit expires
- June 2030
- Population served
- 134
- CWNS 2022
Herrings STP is a publicly owned wastewater treatment works in Carthage, Jefferson County, New York treating an average of 0.0053 million gallons per day against a permitted design capacity of 0.01 MGD, serving about 134 residents. It discharges under NPDES permit NY0236306 (effective), which expires in June 2030, with 12 recorded violations 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
- 12
- Effluent violations
- 12
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Herrings STP.
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Nearby wastewater treatment plants in New York
Deferiet · 2 mi away
0.01 MGD
Carthage · 3 mi away
0.82 MGD
Evans Mills · 9 mi away
0.02 MGD
Copenhagen · 9 mi away
0.03 MGD
Philadelphia · 10 mi away
0.17 MGD
Antwerp · 12 mi away
0.02 MGD
Watertown · 14 mi away
5.21 MGD
Watertown · 14 mi away
0.007 MGD
Herrings STP: 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 October 31, 2024.