What was found in Hampstead'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 | 1900 µg/L 19% of the EPA limit 10000 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Copper | 336.4 µg/L 26% of the EPA limit 1300 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019
Highest in the city: 1427 µg/L — GLENWOOD NORTH · 50 people · 2019 | 3/3 | SYR4 |
| Fluoride | 842 µg/L 21% of the EPA limit 4000 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 2/3 | SYR4 |
| Barium | 217.7 µg/L 11% of the EPA limit 2000 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 3/3 | SYR4 |
| Lithium | 26.9 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2024 | 1/3 | UCMR-5 |
| Gross Alpha, Excl. Radon And U | 21.585 pCi/L 144% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 2/3 | SYR4 |
| TTHM | 20.945 µg/L 26% of the EPA limit 80 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Chromium | 17.1 µg/L 17% of the EPA limit 100 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 14.36 µg/L 24% of the EPA limit 60 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Arsenic | 10.15 µg/L 102% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 9.865 pCi/L 197% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 2/3 | SYR4 |
| Chloroform | 9.7 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 9.5 µg/L 32% of the EPA limit 30 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 8.44 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 7.685 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Selenium | 7.55 µg/L 15% of the EPA limit 50 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Lead | 7 µg/L 47% of the EPA limit 15 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 6.4 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Trichloroacetic Acid | 5.555 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Bromoform | 4.17 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.51 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.6 µg/L 27% of the EPA limit 6 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| Toluene | 0.5700 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2019 | 1/3 | SYR4 |
| PFOS | 0.0075 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2024 | 1/3 | UCMR-5 |
| PFBS | 0.0072 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2024 | 1/3 | UCMR-5 |
| PFOA | 0.0072 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2024 | 1/3 | UCMR-5 |
| Pfhxa | 0.0051 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2024 | 1/3 | UCMR-5 |
| Pfpea | 0.0050 µg/L No EPA limit set Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: HAMPSTEAD AREA WATER · 7,153 people · 2024 | 1/3 | 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 Hampstead
| Supplier | Population served |
|---|---|
| HAMPSTEAD AREA WATER | 7,153 |
| COACH RUN CONDOS | 60 |
| GLENWOOD NORTH | 50 |
Frequently asked questions about Hampstead tap water
Is Hampstead tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Hampstead. 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 Hampstead?
3 public water suppliers report drinking-water monitoring for Hampstead, New Hampshire to the EPA. Each is listed above with its population served.
What contaminants are in Hampstead's water?
The contaminants EPA monitoring detected in Hampstead include Nitrate, Copper, Fluoride, Barium, Lithium. 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.