NEW CASTLE/STANWOOD W.D.

CHAPPAQUA, NY · ~17,116 people served

Check your exact address → CHAPPAQUA overview

100

Excellent

PurityRadar safety score

PWSID

NY5903442

State

New York

City

CHAPPAQUA

Population served

17,116

Primary source

SWP

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 Jun 2019. Official EPA record →

Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2018 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2018 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 2009 Resolved

Monitoring & reporting · Total coliform began Jun 2007 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2005 Resolved

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

Monitoring & reporting · Cadmium began Jan 2002 Resolved

Monitoring & reporting · Nitrate began Jan 2002 Resolved

Monitoring & reporting · Nitrite began Jan 2002 Resolved

Monitoring & reporting · Thallium began Jan 2002 Resolved

Monitoring & reporting · Arsenic began Jan 2002 Resolved

Monitoring & reporting · Barium began Jan 2002 Resolved

Recent enforcement actions

State action · SIF Jun 2019
State action · SOX Jun 2019
State action · SIE Dec 2018
State action · SFJ Dec 2018
State action · SOX Dec 2009
State action · SIF Dec 2009
State action · SIE Sep 2009
State action · SFJ Sep 2009

This profile is built from EPA public records for system NY5903442 — 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.