What was found in Pelham'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 | 2810 µg/L 28% of the EPA limit 10000 µg/L Main supplier: WILLIAMSBURG · 910 people · 2019
Highest in the city: 6600 µg/L — HIGHLAND ESTATES APARTMENTS · 120 people · 2019 | 8/13 | SYR4 |
| Copper | 691 µg/L 53% of the EPA limit 1300 µg/L Main supplier: WILLIAMSBURG · 910 people · 2018
Highest in the city: 1543.52 µg/L — SIMPSON MILL ROAD · 35 people · 2018 | 11/13 | SYR4 |
| Fluoride | 1200 µg/L 30% of the EPA limit 4000 µg/L Highest in the city: GARLAND WOODS · 115 people · 2017 | 4/13 | SYR4 |
| Nitrate-Nitrite | 420 µg/L 4.2% of the EPA limit 10000 µg/L Highest in the city: REVEL PELHAM · 123 people · 2019 | 1/13 | SYR4 |
| TTHM | 31.55 µg/L 39% of the EPA limit 80 µg/L Main supplier: WILLIAMSBURG · 910 people · 2019
Highest in the city: 122 µg/L — GARLAND WOODS · 115 people · 2019 | 6/13 | SYR4 |
| Chloroform | 13.1 µg/L No EPA limit set Main supplier: WILLIAMSBURG · 910 people · 2019
Highest in the city: 103.75 µg/L — GARLAND WOODS · 115 people · 2019 | 5/13 | SYR4 |
| Barium | 20.905 µg/L 1% of the EPA limit 2000 µg/L Main supplier: WILLIAMSBURG · 910 people · 2018
Highest in the city: 68.45 µg/L — HIGHLAND ESTATES APARTMENTS · 120 people · 2018 | 10/13 | SYR4 |
| Combined Uranium | 31.7 µg/L 106% of the EPA limit, at the 95th percentile of samples — 30 µg/L Highest in the city: HIGHLAND ESTATES APARTMENTS · 120 people · 2019 | 6/13 | SYR4 |
| Lead | 3.21 µg/L 21% of the EPA limit 15 µg/L Main supplier: WILLIAMSBURG · 910 people · 2018
Highest in the city: 27 µg/L — PARADISE ESTATES CONDOMINIUM · 45 people · 2019 | 9/13 | SYR4 |
| Bromodichloromethane | 9.595 µg/L No EPA limit set Main supplier: WILLIAMSBURG · 910 people · 2019
Highest in the city: 12.2 µg/L — GARLAND WOODS · 115 people · 2019 | 6/13 | SYR4 |
| Arsenic | 12 µg/L 120% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: LONG POND WOODS · 102 people · 2019 | 7/13 | SYR4 |
| Gross Alpha, Excl. Radon And U | 10.78 pCi/L 72% of the EPA limit 15 pCi/L Highest in the city: GAGE HILL · 73 people · 2019 | 9/13 | SYR4 |
| Total Haloacetic Acids (HAA5) | 10.375 µg/L 17% of the EPA limit 60 µg/L Main supplier: WILLIAMSBURG · 910 people · 2019 | 2/13 | SYR4 |
| Dibromochloromethane | 7.515 µg/L No EPA limit set Main supplier: WILLIAMSBURG · 910 people · 2019 | 7/13 | SYR4 |
| Chromium | 2.5 µg/L 2.5% of the EPA limit 100 µg/L Main supplier: WILLIAMSBURG · 910 people · 2018
Highest in the city: 7 µg/L — GARLAND WOODS · 115 people · 2017 | 8/13 | SYR4 |
| Xylenes, Total | 5.39 µg/L 0.1% of the EPA limit 10000 µg/L Highest in the city: OLD LAWRENCE ROAD · 25 people · 2019 | 1/13 | SYR4 |
| Combined Radium (-226 And -228) | 1.4 pCi/L 28% of the EPA limit 5 pCi/L Main supplier: WILLIAMSBURG · 910 people · 2016
Highest in the city: 5.255 pCi/L — REVEL PELHAM · 123 people · 2019 | 8/13 | SYR4 |
| Dichloroacetic Acid | 4.4 µg/L No EPA limit set Main supplier: WILLIAMSBURG · 910 people · 2019
Highest in the city: 5.165 µg/L — OLD LAWRENCE ROAD · 25 people · 2019 | 3/13 | SYR4 |
| Trichloroacetic Acid | 1.355 µg/L No EPA limit set Main supplier: WILLIAMSBURG · 910 people · 2019
Highest in the city: 4.74 µg/L — OLD LAWRENCE ROAD · 25 people · 2019 | 2/13 | SYR4 |
| Monochloroacetic Acid | 3.6 µg/L No EPA limit set Main supplier: WILLIAMSBURG · 910 people · 2019 | 1/13 | SYR4 |
| Dibromoacetic Acid | 2.8 µg/L No EPA limit set Main supplier: WILLIAMSBURG · 910 people · 2019 | 3/13 | SYR4 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L Highest in the city: PARADISE ESTATES CONDOMINIUM · 45 people · 2019 | 2/13 | SYR4 |
| Thallium, Total | 2 µg/L 100% of the EPA limit 2 µg/L Highest in the city: GARLAND WOODS · 115 people · 2019 | 1/13 | SYR4 |
| Bromoform | 1.94 µg/L No EPA limit set Main supplier: WILLIAMSBURG · 910 people · 2019 | 5/13 | SYR4 |
| 1,1-Dichloroethylene | 1.4 µg/L 20% of the EPA limit 7 µg/L Highest in the city: GARLAND WOODS · 115 people · 2019 | 1/13 | SYR4 |
| Lead | 0.0190 mg/L 127% above the EPA limit of 0.0150 mg/L Highest in the city: PARADISE ESTATES CONDOMINIUM · 45 people · 2014 | 3/13 | 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 Pelham
| Supplier | Population served |
|---|---|
| WILLIAMSBURG | 910 |
| SKY VIEW ESTATES | 168 |
| REVEL PELHAM | 123 |
| HIGHLAND ESTATES APARTMENTS | 120 |
| GARLAND WOODS | 115 |
| LANDMARK ESTATES CONDOS | 105 |
| LONG POND WOODS | 102 |
| STONEGATE ESTATES | 95 |
| GAGE HILL | 73 |
| PARADISE ESTATES CONDOMINIUM | 45 |
| BOULDER HILLS | 39 |
| SIMPSON MILL ROAD | 35 |
| OLD LAWRENCE ROAD | 25 |
Frequently asked questions about Pelham tap water
Is Pelham tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Pelham. 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 Pelham?
13 public water suppliers report drinking-water monitoring for Pelham, New Hampshire to the EPA. Each is listed above with its population served.
What contaminants are in Pelham's water?
The contaminants EPA monitoring detected in Pelham include Nitrate, Copper, Fluoride, Nitrate-Nitrite, 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.