Mamaroneck (v) Sanitary Sd
West Boston Post Road, Mamaroneck, NY 10543 · Westchester County · Publicly Owned Treatment Works
- Average flow
- 12.11 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 12.11 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. EPA has recorded 1 formal enforcement action naming the plant, the latest in March 2013.
Treatment technology
Treatment structures and unit processes at Mamaroneck (v) Sanitary Sd.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Mamaroneck (v) Sanitary Sd in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $25,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Mar 2013
Westchester County - Department of Environmental Facilities
Administrative order · CWA, NPDES Permit Violations · Unilateral Administrative Order Without Adjudication · Compliance actions $25,000
EPA's description of the case:
“Respondent failed to maintain minimum staffing positions as committed to in the implementation of the industrial pretreatment program (violation of the General Pretreatment Regulations).”
Source: EPA ECHO, civil enforcement case 02-2013-3002.
Full case history with a free Klarifi account
Every action against Mamaroneck (v) Sanitary Sd with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Mamaroneck (v) Sanitary Sd.
No verified contacts on file yet
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Nearby wastewater treatment plants in New York
Rye · 2 mi away
3.58 MGD
New Rochelle · 3 mi away
11.16 MGD
Glen Cove · 8 mi away
—
Yonkers · 9 mi away
65.64 MGD
Great Neck · 11 mi away
2.54 MGD
Armonk · 12 mi away
0.33 MGD
Great Neck · 12 mi away
0.96 MGD
Oyster Bay · 12 mi away
1.03 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 October 26, 2026; facility record last updated December 22, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms