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Tap water quality report

Rotterdam, NY

EPA monitoring detected 19 contaminants across the 3 water suppliers serving Rotterdam. 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.

3
water suppliers
30,080
people served
19
contaminants found
New York rankings Lead in New York PFAS in New York

What was found in Rotterdam'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
711 µg/L 7.1%
of the EPA limit 10000 µg/L
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2019
Highest in the city: 6810 µg/L — ROTTERDAM WD #3 · 1,900 people · 2019
2/3 SYR4
Nitrate-Nitrite
5600 µg/L 56%
of the EPA limit 10000 µg/L
Highest in the city: ROTTERDAM WD #3 · 1,900 people · 2014
1/3 SYR4
Fluoride
265 µg/L 6.6%
of the EPA limit 4000 µg/L
Highest in the city: WEST HILL WATER COMPANY INC. · 180 people · 2017
1/3 SYR4
Barium
41.7 µg/L 2.1%
of the EPA limit 2000 µg/L
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2019
Highest in the city: 47.4 µg/L — ROTTERDAM WD #3 · 1,900 people · 2019
3/3 SYR4
TTHM
15.9795 µg/L 20%
of the EPA limit 80 µg/L
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2019
Highest in the city: 21.18 µg/L — ROTTERDAM WD #3 · 1,900 people · 2019
2/3 SYR4
Chloroform
8.43 µg/L
No EPA limit set
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2017
2/3 SYR4
Arsenic
7.26 µg/L 73%
of the EPA limit 10 µg/L
Highest in the city: WEST HILL WATER COMPANY INC. · 180 people · 2017
1/3 SYR4
Dibromochloromethane
5.942 µg/L
No EPA limit set
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2017
Highest in the city: 6.7 µg/L — ROTTERDAM WD #3 · 1,900 people · 2017
2/3 SYR4
Bromodichloromethane
6.18 µg/L
No EPA limit set
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2017
2/3 SYR4
Total Haloacetic Acids (HAA5)
5.69905 µg/L 9.5%
of the EPA limit 60 µg/L
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2019
2/3 SYR4
Bromoform
0.6800 µg/L
No EPA limit set
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2017
Highest in the city: 4.73 µg/L — ROTTERDAM WD #3 · 1,900 people · 2017
2/3 SYR4
Gross Beta Particle Activity
4 pCi/L
No EPA limit set
Highest in the city: WEST HILL WATER COMPANY INC. · 180 people · 2016
1/3 SYR4
Dibromoacetic Acid
0.5950 µg/L
No EPA limit set
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2017
Highest in the city: 3.198 µg/L — ROTTERDAM WD #3 · 1,900 people · 2017
2/3 SYR4
Combined Radium (-226 And -228)
2.25245 pCi/L 45%
of the EPA limit 5 pCi/L
Highest in the city: WEST HILL WATER COMPANY INC. · 180 people · 2019
1/3 SYR4
Dichloroacetic Acid
1.338 µg/L
No EPA limit set
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2017
Highest in the city: 1.7185 µg/L — ROTTERDAM WD #3 · 1,900 people · 2017
2/3 SYR4
Trichloroacetic Acid
1.6515 µg/L
No EPA limit set
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2017
1/3 SYR4
Chromium
1.6 µg/L 1.6%
of the EPA limit 100 µg/L
Highest in the city: ROTTERDAM WD #3 · 1,900 people · 2019
1/3 SYR4
Trichloroethylene
0.6000 µg/L 12%
of the EPA limit 5 µg/L
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2019
1/3 SYR4
Lead
0.0022 mg/L 15%
of the EPA limit 0.0150 mg/L
Main supplier: ROTTERDAM WD #5 · 28,000 people · 2023
3/3 LCR
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 Rotterdam

SupplierPopulation served
ROTTERDAM WD #5 28,000
ROTTERDAM WD #3 1,900
WEST HILL WATER COMPANY INC. 180

Frequently asked questions about Rotterdam tap water

Is Rotterdam tap water safe to drink?

EPA testing detected 19 contaminants in the water serving Rotterdam. 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 Rotterdam?

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

What contaminants are in Rotterdam's water?

The contaminants EPA monitoring detected in Rotterdam include Nitrate, Nitrate-Nitrite, Fluoride, Barium, TTHM. 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.