Westchester Co Of - Yonkers Joint Waste Water Treatment Plant
Yonkers, NY · Westchester County · Publicly Owned Treatment Works
- Average flow
- 55 MGD
- Design flow
- 120 MGD
- NPDES permit
- NY0026689
- Administratively continued
- Permit expires
- May 2019
- Population served
- 495,659
- CWNS 2022
Westchester Co Of - Yonkers Joint Waste Water Treatment Plant is a publicly owned wastewater treatment works in Yonkers, Westchester County, New York treating an average of 55 million gallons per day against a permitted design capacity of 120 MGD, serving about 495,659 residents. Treatment on site includes biogas silos. It discharges under NPDES permit NY0026689 (administratively continued), which expires in May 2019, with 29 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biogas silos
Unlock
Unlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 29
- Effluent violations
- 24
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Yonkers
Yonkers's capital improvement plan lists 3 water, sewer and wastewater line items worth $23M starting 2026–2026. The largest budgeted items are shown here.
All water and sewer capital projects in Yonkers →
| Project | Budget | Years |
|---|---|---|
| Water Systems Improvements | $21,500,000 | 2026–2029 |
| Crisfield Pump Station | $1,100,000 | 2026–2026 |
| Water Tower Rehabilitation | $750,000 | 2026–2026 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
5 verified contacts for Westchester Co Of - Yonkers Joint Waste Water Treatment Plant, with validated emails and direct phone numbers.
Unlock 5 verified contacts (2 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Westchester Co Of - Yonkers Joint Waste Water Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New York
New York · 7 mi away
110 MGD
New Rochelle · 7 mi away
9 MGD
Bronx · 8 mi away
109 MGD
Orangeburg · 8 mi away
5.18 MGD
Manhattan · 9 mi away
174 MGD
Queens · 9 mi away
57 MGD
Mamaroneck · 9 mi away
11 MGD
Astoria · 10 mi away
94 MGD
Westchester Co Of - Yonkers Joint Waste Water Treatment Plant: 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 January 23, 2025.