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Tap water quality report

South Nyack, NY

EPA monitoring detected 23 contaminants across the 1 water supplier serving South Nyack. 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.

1
water supplier
14,700
people served
23
contaminants found
New York rankings Lead in New York PFAS in New York

What was found in South Nyack'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
530 µg/L 5.3%
of the EPA limit 10000 µg/L
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2014
1/1 SYR4
Nitrate-Nitrite
430 µg/L 4.3%
of the EPA limit 10000 µg/L
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2014
1/1 SYR4
Barium
107 µg/L 5.4%
of the EPA limit 2000 µg/L
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
TTHM
88.63 µg/L 111%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Chloroform
55.3 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
51.2 µg/L 85%
of the EPA limit 60 µg/L
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Dichloroacetic Acid
31 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Bromodichloromethane
25 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Trichloroacetic Acid
22.4 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Dibromochloromethane
8.12 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Monobromoacetic Acid
6.99 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Selenium
2.3 µg/L 4.6%
of the EPA limit 50 µg/L
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Dibromoacetic Acid
1.9 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Bromoform
1.3 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
Monochloroacetic Acid
1.29 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2019
1/1 SYR4
PFOA
0.0098 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2025
1/1 UCMR-5
Lead
0.0060 mg/L 40%
of the EPA limit 0.0150 mg/L
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2023
1/1 LCR
PFOS
0.0052 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2025
1/1 UCMR-5
Pfpea
0.0052 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2025
1/1 UCMR-5
Pfba
0.0051 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2025
1/1 UCMR-5
Pfhxa
0.0047 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2025
1/1 UCMR-5
PFBS
0.0033 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2025
1/1 UCMR-5
Pfhpa
0.0032 µg/L
No EPA limit set
Main supplier: NYACK VILLAGE WATER SUPPLY · 14,700 people · 2025
1/1 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 South Nyack

SupplierPopulation served
NYACK VILLAGE WATER SUPPLY 14,700

Frequently asked questions about South Nyack tap water

Is South Nyack tap water safe to drink?

EPA testing detected 23 contaminants in the water serving South Nyack. 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 South Nyack?

1 public water supplier report drinking-water monitoring for South Nyack, New York to the EPA. Each is listed above with its population served.

What contaminants are in South Nyack's water?

The contaminants EPA monitoring detected in South Nyack include Nitrate, Nitrate-Nitrite, Barium, TTHM, Chloroform. 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.