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Tap water quality report

Seabrook, NH

EPA monitoring detected 24 contaminants across the 1 water supplier serving Seabrook. 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
14,000
people served
24
contaminants found
New Hampshire rankings Lead in New Hampshire PFAS in New Hampshire

What was found in Seabrook'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
1449.5 µg/L 14%
of the EPA limit 10000 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Copper
768.554 µg/L 59%
of the EPA limit 1300 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Nitrite
340 µg/L 34%
of the EPA limit 1000 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
TTHM
32.35 µg/L 40%
of the EPA limit 80 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Barium
28.955 µg/L 1.4%
of the EPA limit 2000 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2018
1/1 SYR4
Chloroform
11.45 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Bromodichloromethane
9.16 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Dibromochloromethane
8.42 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
6.51 µg/L 11%
of the EPA limit 60 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Lead
6.19093 µg/L 41%
of the EPA limit 15 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Chromium
3.2576 µg/L 3.3%
of the EPA limit 100 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2018
1/1 SYR4
Combined Radium (-226 And -228)
3.2 pCi/L 64%
of the EPA limit 5 pCi/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Combined Uranium
3.08 µg/L 10%
of the EPA limit 30 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Arsenic
2.82 µg/L 28%
of the EPA limit 10 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Dichloroacetic Acid
2.65 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Bromoform
2.51 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Dibromoacetic Acid
2.5 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Trichloroacetic Acid
1.73465 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Dichloromethane
1 µg/L 20%
of the EPA limit 5 µg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
0.6000 pCi/L 4%
of the EPA limit 15 pCi/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2016
1/1 SYR4
PFOA
0.0080 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2024
1/1 UCMR-5
PFOS
0.0053 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2024
1/1 UCMR-5
Pfhxa
0.0044 µg/L
No EPA limit set
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2024
1/1 UCMR-5
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: SEABROOK WATER DEPT · 14,000 people · 2024
1/1 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 Seabrook

SupplierPopulation served
SEABROOK WATER DEPT 14,000

Frequently asked questions about Seabrook tap water

Is Seabrook tap water safe to drink?

EPA testing detected 24 contaminants in the water serving Seabrook. 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 Seabrook?

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

What contaminants are in Seabrook's water?

The contaminants EPA monitoring detected in Seabrook include Nitrate, Copper, Nitrite, TTHM, 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.