Is Seabrook Water Dept Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Rockingham

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

156

health-based violations

1,029

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-09-01 → 2011-09-30
MCL	Health-based	Resolved	2011-01-01 → 2011-03-31
MCL	Health-based	Resolved	2011-01-01 → 2011-03-31
MCL	Health-based	Resolved	2011-01-01 → 2011-03-31
MCL	Health-based	Resolved	2011-01-01 → 2011-03-31
MCL	Health-based	Resolved	2010-10-01 → 2010-12-31
MCL	Health-based	Resolved	2010-10-01 → 2010-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFOA	0.0080 µg/L	2/8	2024
Pfhxa	0.0044 µg/L	1/8	2024
PFOS	0.0053 µg/L	1/8	2024

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	768.554 µg/L 59% of the EPA limit 1300 µg/L worst single sample: 1530 µg/L	290/290	SYR4	2014–2019
Lead	6.19093 µg/L 41% of the EPA limit 15 µg/L worst single sample: 52.5 µg/L	139/280	SYR4	2014–2019
TTHM	32.35 µg/L 40% of the EPA limit 80 µg/L worst single sample: 54 µg/L	34/51	SYR4	2014–2019
Bromodichloromethane	9.16 µg/L No EPA limit set worst single sample: 10 µg/L	33/51	SYR4	2014–2019
Dibromochloromethane	8.42 µg/L No EPA limit set worst single sample: 9.4 µg/L	33/51	SYR4	2014–2019
Chloroform	11.45 µg/L No EPA limit set worst single sample: 45 µg/L	32/51	SYR4	2014–2019
Bromoform	2.51 µg/L No EPA limit set worst single sample: 3.3 µg/L	30/51	SYR4	2014–2019
Nitrate	1449.5 µg/L 14% of the EPA limit 10000 µg/L worst single sample: 1490 µg/L	30/58	SYR4	2014–2019
Arsenic	2.82 µg/L 28% of the EPA limit 10 µg/L worst single sample: 3.5 µg/L	25/54	SYR4	2014–2019
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L	20/20	LCR	2024
Total Haloacetic Acids (HAA5)	6.51 µg/L 11% of the EPA limit 60 µg/L worst single sample: 6.7 µg/L	20/20	SYR4	2014–2019
Dibromoacetic Acid	2.5 µg/L No EPA limit set	18/20	SYR4	2014–2019
Dichloroacetic Acid	2.65 µg/L No EPA limit set worst single sample: 2.8 µg/L	16/20	SYR4	2014–2019
Barium	28.955 µg/L 1.4% of the EPA limit 2000 µg/L worst single sample: 29.9 µg/L	10/10	SYR4	2014–2018
Trichloroacetic Acid	1.73465 µg/L No EPA limit set worst single sample: 1.763 µg/L	10/20	SYR4	2014–2019
Chromium	3.2576 µg/L 3.3% of the EPA limit 100 µg/L worst single sample: 3.447 µg/L	5/10	SYR4	2014–2018
Combined Radium (-226 And -228)	3.2 pCi/L 64% of the EPA limit 5 pCi/L worst single sample: 3.6 pCi/L	5/6	SYR4	2014–2019
Combined Uranium	3.08 µg/L 10% of the EPA limit 30 µg/L worst single sample: 3.3 µg/L	5/7	SYR4	2014–2019
Dichloromethane	1 µg/L 20% of the EPA limit 5 µg/L	1/31	SYR4	2014–2019
Gross Alpha, Excl. Radon And U	0.6000 pCi/L 4% of the EPA limit 15 pCi/L	1/5	SYR4	2014–2016
Nitrite	340 µg/L 34% of the EPA limit 1000 µg/L	1/10	SYR4	2015–2019

83 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: CURTIS SLAYTON

Frequently asked questions about Seabrook Water Dept

Is Seabrook Water Dept tap water safe to drink?

EPA monitoring detected 24 contaminants in Seabrook Water Dept's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Seabrook Water Dept's water?

EPA monitoring detected Copper, Lead, TTHM, Bromodichloromethane, Dibromochloromethane, and others. The full list with the level and data source for each is above.

How many people does Seabrook Water Dept serve?

Seabrook Water Dept reports serving 14,000 people in New Hampshire, per its EPA record.

Has Seabrook Water Dept had any water quality violations?

The EPA has 1029 violations on file for Seabrook Water Dept, of which 156 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.