States ›New York ›Rockland County ›Clarkstown

Clarkstown, NY Tap Water Quality 2026

Water quality report for Clarkstown, NY — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Clarkstown's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Veolia Water New York PWSID: NY4303673 Updated: 2026 Q2
⚠️

PFAS above the federal limit at 18 of 34 sampling points

Lead is 3.00 ppb, 20% of the action level and no violations are open. However, PFAS exceeds the federal limit at 18 of 34 sampling points, running as high as 2.49 times the limit.

C

Clarkstown earns a C for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 3.00 ppb — 20% of the federal action level
PFAS above the federal limit at 18 of 34 sampling points
1 violations since 2015, 1 health-based
No violations currently open
Clarkstown's lead level vs. all New York community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.00 ppb — 20% of the federal action level
✓ Lower lead than 45% of New York utilities
Population Served
84127
~56150 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
1 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
20% of EPA action level
3.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.00 ppb, 20% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
TTHM MCL EXCEEDANCE 84.2 UG/L 0.080 mg/L 2016 Archived
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

1 violations are on record since 2015, of which 1 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Veolia Water New York
PWSID NY4303673
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 84,127
Service connections 56,150
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Clarkstown tap water safe to drink? ▼
It meets most federal standards, but PFAS exceeds the federal limit at 18 of 34 sampling points. No violations are currently open. Lead is 3.00 ppb, 20% of the action level.
Does Clarkstown water have PFAS? ▼
Yes. PFAS exceeds the federal limit at 18 of 34 sampling points, running as high as 2.49 times the limit. Limits are enforced on a running annual average at each sampling point, not on a single sample.
Who supplies water to Clarkstown? ▼
Veolia Water New York (PWSID NY4303673), one of 2 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2023-03-03. No significant deficiencies were recorded.

What Should Clarkstown Residents Do?

1
Consider a reverse-osmosis filter
Reverse osmosis removes more than 95% of PFAS. Standard carbon pitchers do not.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in New York

Ramapo, Ny Tap Water Quality 2026 Rockland Orangetown, Ny Tap Water Quality 2026 Rockland Haverstraw, Ny Tap Water Quality 2026 Rockland Spring Valley, Ny Tap Water Quality 2026 Rockland Stony Point, Ny Tap Water Quality 2026 Rockland Pomona, Ny Tap Water Quality 2026 Rockland