Mamaroneck (v) Sanitary Sd
Mamaroneck, NY · Westchester County · Publicly Owned Treatment Works
- Average flow
- 11 MGD
- Design flow
- 20.6 MGD
- NPDES permit
- NY0026701
- Administratively continued
- Permit expires
- March 2013
- Population served
- 103,618
- CWNS 2022
Mamaroneck (v) Sanitary Sd is a publicly owned wastewater treatment plant in Mamaroneck, Westchester County, New York treating an average of 11 million gallons per day against a permitted design capacity of 20.6 MGD, serving about 103,618 residents. It discharges under NPDES permit NY0026701 (administratively continued), which expires in March 2013, 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 Mamaroneck (v) Sanitary Sd.
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Nearby wastewater treatment plants in New York
Rye · 2 mi away
3.3 MGD
New Rochelle · 3 mi away
9 MGD
Glen Cove · 8 mi away
—
Yonkers · 9 mi away
55 MGD
Great Neck · 11 mi away
2.5 MGD
Armonk · 12 mi away
0.31 MGD
Great Neck · 12 mi away
0.92 MGD
Oyster Bay · 12 mi away
1.02 MGD
Mamaroneck (v) Sanitary Sd: 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 December 22, 2024.