Is Mount Pleasant, NY tap water safe?

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

No federal limits exceeded in EPA data for Kensico Water District.

13 public water systems serve parts of Mount Pleasant. The largest, Kensico Water District, serves 17,917 people. Your water bill names your system.

Largest system

Kensico Water District

17,917 people · Purchased surface water · EPA ID NY5930082

Buys treated water from New York City System.

PFAS	Highest average	Limit	Status
PFOA Not detected	–	4 ppt	Not detected
PFOS Not detected	–	4 ppt	Not detected
PFHxS Not detected	–	10 ppt	Not detected
PFNA Not detected	–	10 ppt	Not detected
HFPO-DA (GenX) Not detected	–	10 ppt	Not 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: 0 ppb at the 90th percentile (Nov 2026, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 6

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.

Mount Pleasant homes and lead pipes

79%

of homes built before 1980 (New York 74%, US 50%)

36%

built before 1950 (New York 38%)

30%

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. How to check your own line.

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

Which system serves your ZIP code

Based on the ZIP codes each system reported serving. Boundaries don't follow ZIP lines exactly, so your water bill is the final word.

System	ZIP codes in Mount Pleasant
Kensico Water District 17,917 people	10510, 10532, 10594, 10595
Sleepy Hollow (Village) Water System 9,870 people	10591
Pleasantville Water District 9,550 people	10570

Other water systems serving Mount Pleasant

Sleepy Hollow (Village) Water System
9,870 people · Purchased surface water · New York · lists this city
No PFAS above limits
Pleasantville Water District
9,550 people · Purchased surface water · New York · lists this city
No PFAS above limits
Pace University Water System
2,753 people · Purchased surface water · New York · lists this city
Not in EPA's PFAS sample
Old Farm Hill Water District
1,768 people · Purchased surface water · New York · lists this city
Haloacetic acids (HAA5) violations
Bear Ridge Lake Water District
518 people · Purchased surface water · New York · lists this city
Not in EPA's PFAS sample
Pocantico Hills Water District
329 people · Surface water · New York · lists this city
Haloacetic acids (HAA5) violations

6 more systems

Applehill Farm Water District
209 people · Purchased surface water · New York · lists this city
Not in EPA's PFAS sample
Pleasant Ridge Water District
95 people · Purchased surface water · New York · lists this city
Not in EPA's PFAS sample
Meadowbrook Water District
91 people · Purchased surface water · New York · lists this city
Not in EPA's PFAS sample
Mill River Water District
74 people · Purchased surface water · New York · lists this city
Not in EPA's PFAS sample
Pleasantville Road Water District
56 people · Purchased surface water · New York · lists this city
Not in EPA's PFAS sample
Pleasantville Extension #1 Water System
49 people · Purchased surface water · New York · lists this city
Not in EPA's PFAS sample

How nearby cities compare

City	Main water system	PFAS	Lead (90th pct.)
Ossining 4 mi Ossining Water Department	Ossining Water Department	None above limits	3 ppb
Greenburgh 6 mi Greenburgh Consolidated Water District #1	Greenburgh Consolidated Water District #1	None above limits	1.29 ppb
White Plains 7 mi White Plains City Water System	White Plains City Water System	None above limits	1.25 ppb
Harrison 8 mi Westchester Joint Water Works	Westchester Joint Water Works	None above limits	3 ppb
Clarkstown 8 mi Veolia Water New York	Veolia Water New York	Above limit	3 ppb
Port Chester 11 mi Veolia Water New York, Inc. Rd-2	Veolia Water New York, Inc. Rd-2	Above limit	2 ppb

Questions

Is Mount Pleasant tap water safe to drink?

Kensico Water District had 6 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 Mount Pleasant, NY?

13 public water systems serve parts of Mount Pleasant. The largest is Kensico Water District (17,917 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Mount Pleasant tap water have PFAS?

None detected above EPA's reporting limits. Kensico Water District had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.

Do Mount Pleasant homes have lead pipes?

Census estimates put 79% of Mount Pleasant 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. Kensico Water District'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.