WESTCHESTER JOINT WATER WORKS

MAMARONECK, NY · ~59,629 people served

Check your exact address → MAMARONECK overview

100

Excellent

PurityRadar safety score

PWSID

NY5903435

State

New York

City

MAMARONECK

Population served

59,629

Primary source

Surface water

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2024. Official EPA record →

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jul 2019 Resolved

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2019 Resolved

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2019 Resolved

Treatment technique · EPA contaminant 0800 health-based began May 2015 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2009 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2007 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2005 Resolved

Treatment technique · EPA contaminant 0200 health-based began Jun 1993 Addressed

Recent enforcement actions

State action · SOX Apr 2024
State action · SIF May 2021
State action · SFJ Mar 2021
State action · SIE Mar 2021
EPA/federal action · EFL Nov 2019
State action · SOX Sep 2019
State action · SIF Aug 2019
State action · SFJ Aug 2019

This profile is built from EPA public records for system NY5903435 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.