What was found in Plaistow'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 | 3960 µg/L 40% of the EPA limit 10000 µg/L Highest in the city: WEST PINE CONDOS · 60 people · 2019 | 8/19 | SYR4 |
| Copper | 1375.5 µg/L 106% of the EPA limit, at the 95th percentile of samples — 1300 µg/L Highest in the city: SWEET HILL ESTATES · 85 people · 2019 | 18/19 | SYR4 |
| Fluoride | 584 µg/L 15% of the EPA limit 4000 µg/L Highest in the city: TWIN RIDGE CONDOS · 348 people · 2018 | 6/19 | SYR4 |
| Barium | 114.42 µg/L 5.7% of the EPA limit 2000 µg/L Highest in the city: STRAWBERRY HILL · 50 people · 2018 | 17/19 | SYR4 |
| TTHM | 55.7 µg/L 70% of the EPA limit 80 µg/L Highest in the city: THE RESERVE AT SNOWS BROOK · 85 people · 2019 | 11/19 | SYR4 |
| Lead | 35.6 µg/L 237% of the EPA limit, at the 95th percentile of samples — 15 µg/L Highest in the city: RAINBOW RIDGE · 38 people · 2019 | 15/19 | SYR4 |
| Chloroform | 31.24 µg/L No EPA limit set Highest in the city: THE RESERVE AT SNOWS BROOK · 85 people · 2019 | 12/19 | SYR4 |
| Bromodichloromethane | 21.825 µg/L No EPA limit set Highest in the city: THE RESERVE AT SNOWS BROOK · 85 people · 2019 | 10/19 | SYR4 |
| Arsenic | 15.635 µg/L 156% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: SWEET HILL ESTATES · 85 people · 2018 | 12/19 | SYR4 |
| Chromium | 12.6 µg/L 13% of the EPA limit 100 µg/L Highest in the city: THE RESERVE AT SNOWS BROOK · 85 people · 2019 | 14/19 | SYR4 |
| Dibromochloromethane | 11 µg/L No EPA limit set Highest in the city: THE RESERVE AT SNOWS BROOK · 85 people · 2019 | 10/19 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.5 µg/L 16% of the EPA limit 60 µg/L Highest in the city: THE RESERVE AT SNOWS BROOK · 85 people · 2019 | 6/19 | SYR4 |
| Dichloroacetic Acid | 9.41 µg/L No EPA limit set Highest in the city: GREENFIELD HILL ESTATES · 110 people · 2018 | 7/19 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.975 pCi/L 53% of the EPA limit 15 pCi/L Highest in the city: SWEET HILL ESTATES · 85 people · 2018 | 11/19 | SYR4 |
| Bromoform | 7.92 µg/L No EPA limit set Highest in the city: TWIN RIDGE CONDOS · 348 people · 2019 | 9/19 | SYR4 |
| Trichloroacetic Acid | 7.285 µg/L No EPA limit set Highest in the city: THE RESERVE AT SNOWS BROOK · 85 people · 2019 | 5/19 | SYR4 |
| Combined Uranium | 6.50496 µg/L 22% of the EPA limit 30 µg/L Highest in the city: TWIN RIDGE CONDOS · 348 people · 2019 | 7/19 | SYR4 |
| Combined Radium (-226 And -228) | 6 pCi/L 120% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Highest in the city: GOLDEN HILL · 110 people · 2019 | 12/19 | SYR4 |
| Dibromoacetic Acid | 3.77 µg/L No EPA limit set Highest in the city: TWIN RIDGE CONDOS · 348 people · 2019 | 5/19 | SYR4 |
| Toluene | 2.2 µg/L 0.2% of the EPA limit 1000 µg/L Highest in the city: STONEBRIDGE VILLAGE · 60 people · 2019 | 1/19 | SYR4 |
| Selenium | 1.3 µg/L 2.6% of the EPA limit 50 µg/L Highest in the city: SWEET HILL ESTATES · 85 people · 2018 | 4/19 | SYR4 |
| Mercury | 0.1200 µg/L 6% of the EPA limit 2 µg/L Highest in the city: SWEET HILL ESTATES · 85 people · 2018 | 1/19 | SYR4 |
| Lead | 0.0330 mg/L 220% above the EPA limit of 0.0150 mg/L Highest in the city: RAINBOW RIDGE · 38 people · 2017 | 2/19 | 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 Plaistow
| Supplier | Population served |
|---|---|
| PLAISTOW WATER DEPT | 465 |
| TWIN RIDGE CONDOS | 348 |
| VALLEY FIELD APTS NORTHLAND | 200 |
| MOONGATE FARM | 120 |
| GREENFIELD HILL ESTATES | 110 |
| GOLDEN HILL | 110 |
| THE RESERVE AT SNOWS BROOK | 85 |
| SWEET HILL ESTATES | 85 |
| TUXBURY MEADOWS | 75 |
| CROSS RIDGE ESTATES | 73 |
| FOREST GLEN CONDOS | 70 |
| LITTLE RIVER VILLAGE | 63 |
| STONEBRIDGE VILLAGE | 60 |
| WEST PINE CONDOS | 60 |
| BRYANT BROOK | 55 |
| STRAWBERRY HILL | 50 |
| RAINBOW RIDGE | 38 |
| BLUEBERRY KNOLL ESTATES | 32 |
| RUTLEDGE PLACE | 30 |
Frequently asked questions about Plaistow tap water
Is Plaistow tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Plaistow. 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 Plaistow?
19 public water suppliers report drinking-water monitoring for Plaistow, New Hampshire to the EPA. Each is listed above with its population served.
What contaminants are in Plaistow's water?
The contaminants EPA monitoring detected in Plaistow include Nitrate, Copper, Fluoride, Barium, TTHM. 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.