What was found in Hampton'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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 3600 µg/L 36% of the EPA limit 10000 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 3/5 | SYR4 |
| Copper | 721 µg/L 55% of the EPA limit 1300 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 2/5 | SYR4 |
| Nitrate-Nitrite | 397.5 µg/L 4% of the EPA limit 10000 µg/L Highest in the city: HEMLOCK HAVEN · 207 people · 2019 | 2/5 | SYR4 |
| Fluoride | 185 µg/L 4.6% of the EPA limit 4000 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019
Highest in the city: 280 µg/L — HEMLOCK HAVEN · 207 people · 2018 | 2/5 | SYR4 |
| Lead | 190 µg/L 1267% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2017 | 2/5 | SYR4 |
| Barium | 35.8 µg/L 1.8% of the EPA limit 2000 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 2/5 | SYR4 |
| TTHM | 25.6 µg/L 32% of the EPA limit 80 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 2/5 | SYR4 |
| Lithium | 24.9 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2024 | 1/5 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 4.74 µg/L 7.9% of the EPA limit 60 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019
Highest in the city: 13 µg/L — TAYLOR RIVER ESTATES · 90 people · 2019 | 2/5 | SYR4 |
| Dibromochloromethane | 10.15 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 2/5 | SYR4 |
| Bromodichloromethane | 6.475 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 1/5 | SYR4 |
| Bromoform | 4.83 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 1/5 | SYR4 |
| Arsenic | 4 µg/L 40% of the EPA limit 10 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 1/5 | SYR4 |
| Dibromoacetic Acid | 3.48 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 1/5 | SYR4 |
| Chromium | 3.375 µg/L 3.4% of the EPA limit 100 µg/L Highest in the city: TAYLOR RIVER ESTATES · 90 people · 2018 | 1/5 | SYR4 |
| Chloroform | 2.695 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 1/5 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.18 pCi/L 15% of the EPA limit 15 pCi/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 2/5 | SYR4 |
| Combined Uranium | 2.16 µg/L 7.2% of the EPA limit 30 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 1/5 | SYR4 |
| Combined Radium (-226 And -228) | 1.75 pCi/L 35% of the EPA limit 5 pCi/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019
Highest in the city: 2.1 pCi/L — FOUR SEASONS MOBILE HOME PARK · 55 people · 2014 | 2/5 | SYR4 |
| Dichloroacetic Acid | 1.585 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 1/5 | SYR4 |
| Selenium | 1.1 µg/L 2.2% of the EPA limit 50 µg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2019 | 1/5 | SYR4 |
| Pfpea | 0.0251 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2024 | 1/5 | UCMR-5 |
| Pfhxa | 0.0101 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2024 | 1/5 | UCMR-5 |
| Pfba | 0.0050 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2024 | 1/5 | UCMR-5 |
| PFOA | 0.0047 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2024 | 1/5 | UCMR-5 |
| PFOS | 0.0045 µg/L No EPA limit set Main supplier: AQUARION WATER/NH · 34,000 people · 2024 | 1/5 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: AQUARION WATER/NH · 34,000 people · 2024 | 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 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 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, Nitrate-Nitrite, Fluoride, Lead. 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.