Is Hampton, NH Tap Water Safe? Quality & Contaminants

What was found in Hampton's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	4100 µg/L 41% of the EPA limit 10000 µg/L	3/5	SYR4
Copper	1300 µg/L 100% of the EPA limit 1300 µg/L	2/5	SYR4
Lead	460 µg/L 3067% of the EPA limit, in the worst sample — 15 µg/L	2/5	SYR4
Nitrate-Nitrite	410 µg/L 4.1% of the EPA limit 10000 µg/L	2/5	SYR4
Fluoride	280 µg/L 7% of the EPA limit 4000 µg/L	2/5	SYR4
Barium	41 µg/L 2.1% of the EPA limit 2000 µg/L	2/5	SYR4
TTHM	32.1 µg/L 40% of the EPA limit 80 µg/L	2/5	SYR4
Lithium	24.9 µg/L No EPA limit set	1/5	UCMR-5
Dibromochloromethane	13 µg/L No EPA limit set	2/5	SYR4
Total Haloacetic Acids (HAA5)	13 µg/L 22% of the EPA limit 60 µg/L	2/5	SYR4
Bromodichloromethane	9.7 µg/L No EPA limit set	1/5	SYR4
Arsenic	6.5 µg/L 65% of the EPA limit 10 µg/L	1/5	SYR4
Bromoform	4.9 µg/L No EPA limit set	1/5	SYR4
Chloroform	4.5 µg/L No EPA limit set	1/5	SYR4
Dibromoacetic Acid	3.6 µg/L No EPA limit set	1/5	SYR4
Chromium	3.4 µg/L 3.4% of the EPA limit 100 µg/L	1/5	SYR4
Gross Alpha, Excl. Radon And U	2.9 pCi/L 19% of the EPA limit 15 pCi/L	2/5	SYR4
Combined Uranium	2.2 µg/L 7.3% of the EPA limit 30 µg/L	1/5	SYR4
Combined Radium (-226 And -228)	2.1 pCi/L 42% of the EPA limit 5 pCi/L	2/5	SYR4
Dichloroacetic Acid	1.6 µg/L No EPA limit set	1/5	SYR4
Selenium	1.1 µg/L 2.2% of the EPA limit 50 µg/L	1/5	SYR4
Pfpea	0.0251 µg/L No EPA limit set	1/5	UCMR-5
Pfhxa	0.0101 µg/L No EPA limit set	1/5	UCMR-5
Pfba	0.0050 µg/L No EPA limit set	1/5	UCMR-5
PFOA	0.0047 µg/L No EPA limit set	1/5	UCMR-5
PFOS	0.0045 µg/L No EPA limit set	1/5	UCMR-5
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	1/5	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 single worst sample on record — 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 Hampton

Supplier	Population served
AQUARION WATER/NH	34,000
HEMLOCK HAVEN	207
SUN VALLEY	200
TAYLOR RIVER ESTATES	90
FOUR SEASONS MOBILE HOME PARK	55

Frequently asked questions about Hampton tap water

Is Hampton tap water safe to drink?

EPA testing detected 27 contaminants in the water serving Hampton. 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 Hampton?

5 public water suppliers report drinking-water monitoring for Hampton, New Hampshire to the EPA. Each is listed above with its population served.

What contaminants are in Hampton's water?

The contaminants EPA monitoring detected in Hampton include Nitrate, Copper, Lead, Nitrate-Nitrite, Fluoride. The full list, with the highest level found 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.