North Chautauqua Lake Sd WWTF
Mayville, NY · Chautauqua County · Publicly Owned Treatment Works
- Average flow
- 0.17 MGD
- Design flow
- 0.5 MGD
- NPDES permit
- NY0020826
- Administratively continued
- Permit expires
- March 2020
- Population served
- 6,747
- CWNS 2022
North Chautauqua Lake Sd WWTF is a publicly owned wastewater treatment works in Mayville, Chautauqua County, New York treating an average of 0.17 million gallons per day against a permitted design capacity of 0.5 MGD, serving about 6,747 residents. Treatment on site includes clarifiers. It discharges under NPDES permit NY0020826 (administratively continued), which expires in March 2020, with 13 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 13
- Effluent violations
- 13
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at North Chautauqua Lake Sd WWTF.
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Nearby wastewater treatment plants in New York
Chautauqua · 3 mi away
0.12 MGD
Westfield · 8 mi away
0.71 MGD
Brocton · 11 mi away
0.13 MGD
Ripley · 12 mi away
0.09 MGD
Celoron · 15 mi away
1.5 MGD
Dunkirk · 19 mi away
1.2 MGD
Jamestown · 20 mi away
3.84 MGD
Dunkirk · 20 mi away
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North Chautauqua Lake Sd 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 14, 2025.