States ›New York ›Westchester County ›Ossining

Ossining, NY Tap Water Quality 2026

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

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

Main Utility: Ossining Water Department PWSID: NY5903451 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.00 ppb, 20% of the action level and no violations are open. PFAS was detected below the federal limit.

A

Ossining earns an A for water quality

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

Lead: 3.00 ppb — 20% of the federal action level
PFAS detected below the federal limit
50 violations since 2015, 0 health-based
No violations currently open
Ossining'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
33122
~6600 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
50 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 MONITORING AND REPORTING — 0.080 mg/L 2022 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2022 Resolved
Endrin MONITORING AND REPORTING — 0.002 mg/L 2015 Resolved
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2015 Resolved
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2015 Resolved
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2015 Resolved
Dalapon MONITORING AND REPORTING — 0.2 mg/L 2015 Resolved
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2015 Resolved
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2015 Resolved
Simazine MONITORING AND REPORTING — 0.004 mg/L 2015 Resolved
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2015 Resolved
Picloram MONITORING AND REPORTING — 0.5 mg/L 2015 Resolved
Dinoseb MONITORING AND REPORTING — 0.007 mg/L 2015 Resolved
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2015 Resolved
Aldicarb sulfoxide MONITORING AND REPORTING — — 2015 Resolved
Aldicarb sulfone MONITORING AND REPORTING — — 2015 Resolved
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2015 Resolved
Aldicarb MONITORING AND REPORTING — — 2015 Resolved
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2015 Resolved
LASSO MONITORING AND REPORTING — — 2015 Resolved
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2015 Resolved
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2015 Resolved
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2015 Resolved
2,4,5-TP MONITORING AND REPORTING — 0.05 mg/L 2015 Resolved
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2015 Resolved
Benzo(a)pyrene MONITORING AND REPORTING — 0.0002 mg/L 2015 Resolved
Pentachlorophenol MONITORING AND REPORTING — 0.001 mg/L 2015 Resolved
Total Polychlorinated Biphenyls (PCB) MONITORING AND REPORTING — 0.0005 mg/L 2015 Resolved
ETHYLENE DIBROMIDE MONITORING AND REPORTING — 0.00005 mg/L 2015 Resolved
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2015 Resolved
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2015 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2015 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2015 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2015 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2015 Resolved
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2015 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2015 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2015 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2015 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2015 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2015 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2015 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2015 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2015 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2015 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2015 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2015 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2015 Resolved
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2015 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2015 Resolved
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

50 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Ossining Water Department
PWSID NY5903451
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 33,122
Service connections 6,600
Systems serving this area 4
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Ossining tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.00 ppb, 20% of the action level.
Does Ossining water have PFAS? ▼
PFAS was detected but stayed below the federal limit.
Who supplies water to Ossining? ▼
Ossining Water Department (PWSID NY5903451), one of 4 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 2025-07-22. No significant deficiencies were recorded.

What Should Ossining Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
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

Yonkers, Ny Tap Water Quality 2026 Westchester New Rochelle, Ny Tap Water Quality 2026 Westchester Mount Vernon, Ny Tap Water Quality 2026 Westchester White Plains, Ny Tap Water Quality 2026 Westchester Greenburgh, Ny Tap Water Quality 2026 Westchester Rye, Ny Tap Water Quality 2026 Westchester