Westchester Joint Water Works

ZipCheckup's reading of EPA SDWIS for Westchester Joint Water Works (NY5903435): no EPA violations recorded in the last five years. From the earliest to the most recent cycle in the five-year EPA window, Westchester Joint Water Works has logged zero violations - no MCL exceedances, no health advisories, and no enforcement activity across the entire period for the 59,629 people in its service area, a record that stands up well against both state and national benchmarks.

Data: EPA SDWIS

System Overview

Westchester Joint Water Works (EPA ID: NY5903435) is a community water system in New York that serves approximately 59,629 people from surface water sources.

This system provides water to 9 ZIP codes across 9 communities.

ZIP-Area Home Safety Context: A (99/100)

This is the average Home Safety Score for 3 of 9 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.

Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.

Violation History

Lead & Copper

EPA Lead and Copper Rule evidence attributed directly to this water system:

No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.

Radon Risk in Service Area

Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)

ZIP Codes Served

Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by NY or modeled from parcel and building-footprint data.

• 10528 - Harrison
• 10538 - Larchmont
• 10543 - Mamaroneck
• 10573 - Port Chester
• 10577 - Purchase
• 10580 - Rye
• 10583 - Scarsdale
• 10604 - West Harrison
• 10605 - White Plains

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Westchester Joint Water Works (NY5903435) on EPA.gov.

Frequently Asked Questions

Is Westchester Joint Water Works water safe to drink?

The accepted 2026Q2 ECHO snapshot contains zero violation records for Westchester Joint Water Works in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.

How many people does Westchester Joint Water Works serve?

Westchester Joint Water Works serves approximately 59,629 people across 9 ZIP codes in New York.

Where does Westchester Joint Water Works get its water?

The primary water source is surface water.

@misc{zipcheckup-water-system-ny5903435,
  author = {{ZipCheckup}},
  title  = {{Westchester Joint Water Works, NY: Serves 60K People}},
  year   = {n.d.},
  url    = {https://zipcheckup.com/water-system/ny5903435/}
}