Tap Water Results

Is Ossining, NY tap water safe?

Data: U.S. EPA · How we read the data · How we check it

Summary

No federal limits exceeded in EPA data for Ossining Water Department. 1 PFAS were detected below the limits.

2 public water systems serve parts of Ossining. The largest, Ossining Water Department, serves 30,000 people. Your water bill names your system.

Largest system

Ossining Water Department

30,000 people · Surface water · EPA ID NY5903451

Buys treated water from New Castle/Stanwood Water District.

PFASHighest averageLimitStatus
PFOA
One sample above limit
1.07 ppt4 pptOne sample above limit
PFOS
Not detected
–4 pptNot detected
PFHxS
Not detected
–10 pptNot detected
PFNA
Not detected
–10 pptNot detected
HFPO-DA (GenX)
Not detected
–10 pptNot detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 3 ppb at the 90th percentile (Dec 2025, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Across New York, 31 of 322 water systems EPA tested had PFAS above a 2024 federal limit, and 16 systems were above the lead action level in results from the last five years. New York results.

Ossining homes and lead pipes

68%
of homes built before 1980 (New York 74%, US 50%)
28%
built before 1950 (New York 38%)
37%
of households rent (New York 46%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Ossining town (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Ossining

  • Sunshine Childrens Home & Rehab Center Water System
    130 people · Groundwater under influence of surface water · New York · lists this city
    Not in EPA's PFAS sampleAlso: 2 health-based violations since 2016

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Mount Pleasant 4 mi
Kensico Water District
Kensico Water DistrictNone above limits0 ppb
Clarkstown 6 mi
Veolia Water New York
Veolia Water New YorkAbove limit3 ppb
Cortlandt 7 mi
Cortlandt Consolidated Water District
Cortlandt Consolidated Water DistrictNone above limits1.4 ppb
Yorktown 8 mi
Yorktown Consolidated Water District #1
Yorktown Consolidated Water District #1Above limit1.2 ppb
Greenburgh 9 mi
Greenburgh Consolidated Water District #1
Greenburgh Consolidated Water District #1None above limits1.29 ppb
Peekskill 10 mi
Peekskill City Water System
Peekskill City Water SystemNone above limits2 ppb
Ossining ZIP codes (3)
  • 10510
  • 10545
  • 10562

Questions

Is Ossining tap water safe to drink?

Ossining Water Department has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Ossining, NY?

2 public water systems serve parts of Ossining. The largest is Ossining Water Department (30,000 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Ossining tap water have PFAS?

Ossining Water Department had 1 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Ossining homes have lead pipes?

Census estimates put 68% of Ossining homes as built before 1980 (New York: 74%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. Ossining Water Department's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.