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Tap water quality report

Clarkstown, NY

EPA monitoring detected 48 contaminants across the 4 water suppliers serving Clarkstown. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

4
water suppliers
284,842
people served
48
contaminants found
New York rankings Lead in New York PFAS in New York

What was found in Clarkstown's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
3210 µg/L 32%
of the EPA limit 10000 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2018
Highest in the city: 3750 µg/L — SUNRISE BUNGALOWS · 50 people · 2018
4/4 SYR4
Nitrate-Nitrite
3207.5 µg/L 32%
of the EPA limit 10000 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2018
2/4 SYR4
Nitrite
1430 µg/L 143%
of the EPA limit, at the 95th percentile of samples — 1000 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2018
1/4 SYR4
Toluene
1060 µg/L 106%
of the EPA limit, at the 95th percentile of samples — 1000 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Barium
474 µg/L 24%
of the EPA limit 2000 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
2/4 SYR4
Fluoride
312 µg/L 7.8%
of the EPA limit 4000 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
TTHM
97.06 µg/L 121%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
2/4 SYR4
Chloroform
72.36 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
3/4 SYR4
Total Haloacetic Acids (HAA5)
56.08 µg/L 93%
of the EPA limit 60 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
2/4 SYR4
Trichloroacetic Acid
31.85 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
2/4 SYR4
Dichloroacetic Acid
25.92 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
Highest in the city: 31 µg/L — NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
2/4 SYR4
Bromodichloromethane
22.1 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
Highest in the city: 25 µg/L — NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
2/4 SYR4
Lithium
19.1 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
1/4 UCMR-5
Tetrachloroethylene
15.995 µg/L 320%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Chromium
13.595 µg/L 14%
of the EPA limit 100 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Cyanide
12.85 µg/L 6.4%
of the EPA limit 200 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Trichloroethylene
12.66 µg/L 253%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Dibromochloromethane
6.335 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
Highest in the city: 8.12 µg/L — NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
2/4 SYR4
Monobromoacetic Acid
1.27 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
Highest in the city: 6.99 µg/L — NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
2/4 SYR4
Arsenic
6.979 µg/L 70%
of the EPA limit 10 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Monochloroacetic Acid
6.925 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
2/4 SYR4
Selenium
6.34 µg/L 13%
of the EPA limit 50 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
2/4 SYR4
Cadmium
5.9 µg/L 118%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Dibromoacetic Acid
5.53 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
2/4 SYR4
cis-1,2-Dichloroethylene
3.2 µg/L 4.6%
of the EPA limit 70 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Bromoform
2.42 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
3/4 SYR4
Di(2-ethylhexyl) Phthalate
2.4 µg/L 40%
of the EPA limit 6 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Antimony, Total
1.164 µg/L 19%
of the EPA limit 6 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Benzene
1.1 µg/L 22%
of the EPA limit 5 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Beryllium, Total
0.9580 µg/L 24%
of the EPA limit 4 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Mercury
0.9140 µg/L 46%
of the EPA limit 2 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
1,1,2-Trichloroethane
0.7000 µg/L 14%
of the EPA limit 5 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
1,2-Dichloroethane
0.5000 µg/L 10%
of the EPA limit 5 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Carbon Tetrachloride
0.4875 µg/L 9.8%
of the EPA limit 5 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Thallium, Total
0.3080 µg/L 15%
of the EPA limit 2 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Chlordane
0.3050 µg/L 15%
of the EPA limit 2 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
Picloram
0.2430 µg/L 0%
of the EPA limit 500 µg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2019
1/4 SYR4
PFOA
0.0140 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
2/4 UCMR-5
6:2 Fts
0.0120 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
1/4 UCMR-5
Pfpea
0.0100 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
2/4 UCMR-5
Pfhxa
0.0076 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
2/4 UCMR-5
Pfba
0.0068 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
2/4 UCMR-5
PFOS
0.0068 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
2/4 UCMR-5
PFHXS
0.0062 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
1/4 UCMR-5
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
Highest in the city: 0.0060 mg/L — NYACK VILLAGE WATER SUPPLY · 14,700 people · 2023
4/4 LCR
Pfhpa
0.0056 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
2/4 UCMR-5
PFNA
0.0054 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
1/4 UCMR-5
PFBS
0.0050 µg/L
No EPA limit set
Main supplier: VEOLIA WATER NEW YORK · 270,000 people · 2025
2/4 UCMR-5
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Clarkstown

SupplierPopulation served
VEOLIA WATER NEW YORK 270,000
NYACK VILLAGE WATER SUPPLY 14,700
LAKE LUCILLE PROP OWNERS ASSOC 92
SUNRISE BUNGALOWS 50

Frequently asked questions about Clarkstown tap water

Is Clarkstown tap water safe to drink?

EPA testing detected 48 contaminants in the water serving Clarkstown. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Clarkstown?

4 public water suppliers report drinking-water monitoring for Clarkstown, New York to the EPA. Each is listed above with its population served.

What contaminants are in Clarkstown's water?

The contaminants EPA monitoring detected in Clarkstown include Nitrate, Nitrate-Nitrite, Nitrite, Toluene, Barium. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.