What was found in Newmarket'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 | 3275 µg/L 33% of the EPA limit 10000 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 3240 µg/L 32% of the EPA limit 10000 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019 | 1/3 | SYR4 |
| Copper | 111.01 µg/L 8.5% of the EPA limit 1300 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019
Highest in the city: 406.7 µg/L — GREAT BAY WATER SYSTEM · 228 people · 2018 | 3/3 | SYR4 |
| Barium | 21.625 µg/L 1.1% of the EPA limit 2000 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019
Highest in the city: 46.2882 µg/L — GREAT BAY WATER SYSTEM · 228 people · 2017 | 3/3 | SYR4 |
| Lead | 42 µg/L 280% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019 | 3/3 | SYR4 |
| TTHM | 21.25 µg/L 27% of the EPA limit 80 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019
Highest in the city: 40 µg/L — WADE FARM CONDOS · 40 people · 2019 | 3/3 | SYR4 |
| Bromoform | 17 µg/L No EPA limit set Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 3.535 µg/L No EPA limit set Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019
Highest in the city: 14.2 µg/L — WADE FARM CONDOS · 40 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 1.6 µg/L No EPA limit set Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019
Highest in the city: 11.36 µg/L — WADE FARM CONDOS · 40 people · 2019 | 2/3 | SYR4 |
| Chloroform | 0.8800 µg/L No EPA limit set Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019
Highest in the city: 8.14 µg/L — WADE FARM CONDOS · 40 people · 2019 | 2/3 | SYR4 |
| Arsenic | 5.76 µg/L 58% of the EPA limit 10 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 2.975 µg/L No EPA limit set Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 2.975 µg/L 5% of the EPA limit 60 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019 | 1/3 | SYR4 |
| Chromium | 2.401 µg/L 2.4% of the EPA limit 100 µg/L Highest in the city: GREAT BAY WATER SYSTEM · 228 people · 2017 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2 pCi/L 13% of the EPA limit 15 pCi/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2017 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.25 pCi/L 25% of the EPA limit 5 pCi/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2017
Highest in the city: 1.6 pCi/L — WADE FARM CONDOS · 40 people · 2015 | 2/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.295 µg/L 22% of the EPA limit 6 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 1 µg/L 3.3% of the EPA limit 30 µg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2018 | 1/3 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: NEWMARKET WATER WORKS · 5,030 people · 2024 | 1/3 | LCR |
Water suppliers serving Newmarket
| Supplier | Population served |
|---|---|
| NEWMARKET WATER WORKS | 5,030 |
| GREAT BAY WATER SYSTEM | 228 |
| WADE FARM CONDOS | 40 |
Frequently asked questions about Newmarket tap water
Is Newmarket tap water safe to drink?
EPA testing detected 19 contaminants in the water serving Newmarket. 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 Newmarket?
3 public water suppliers report drinking-water monitoring for Newmarket, New Hampshire to the EPA. Each is listed above with its population served.
What contaminants are in Newmarket's water?
The contaminants EPA monitoring detected in Newmarket include Nitrate, Nitrate-Nitrite, Copper, Barium, 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.