Interlaken (v) STP
Interlaken, NY · Seneca County · Publicly Owned Treatment Works
- Average flow
- 0.006 MGD
- Design flow
- 0.1 MGD
- NPDES permit
- NY0029289
- Effective
- Permit expires
- November 2026
- Population served
- 700
- CWNS 2022
Interlaken (v) STP is a publicly owned wastewater treatment works in Interlaken, Seneca County, New York treating an average of 0.006 million gallons per day against a permitted design capacity of 0.1 MGD, serving about 700 residents. It discharges under NPDES permit NY0029289 (effective), which expires in November 2026, with 34 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
- 34
- Effluent violations
- 30
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Interlaken (v) STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in New York
Trumansburg · 7 mi away
0.19 MGD
Aurora · 8 mi away
0.06 MGD
Romulus · 9 mi away
0.13 MGD
Willard · 9 mi away
0.19 MGD
Dundee · 15 mi away
0.24 MGD
Union Springs · 15 mi away
0.09 MGD
Ithaca · 15 mi away
1 MGD
Moravia · 16 mi away
0.38 MGD
Interlaken (v) 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 September 29, 2025.