What was found in Berwick'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 | 550 µg/L 5.5% of the EPA limit 10000 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019
Highest in the city: 1300 µg/L — BERWICK WATER DEPARTMENT · 2,845 people · 2019 | 2/3 | SYR4 |
| Fluoride | 400 µg/L 10% of the EPA limit 4000 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2018
Highest in the city: 857.5 µg/L — BERWICK WATER DEPARTMENT · 2,845 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 489 µg/L 4.9% of the EPA limit 10000 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2018 | 1/3 | SYR4 |
| Copper | 345.75 µg/L 27% of the EPA limit 1300 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2018 | 3/3 | SYR4 |
| Lead | 8 µg/L 53% of the EPA limit 15 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2018
Highest in the city: 151.5 µg/L — BERWICK WATER DEPARTMENT · 2,845 people · 2019 | 2/3 | SYR4 |
| TTHM | 14.14 µg/L 18% of the EPA limit 80 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019
Highest in the city: 135.05 µg/L — BERWICK WATER DEPARTMENT · 2,845 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 3.13 µg/L 5.2% of the EPA limit 60 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019
Highest in the city: 88.6 µg/L — BERWICK WATER DEPARTMENT · 2,845 people · 2019 | 2/3 | SYR4 |
| Barium | 36.2 µg/L 1.8% of the EPA limit 2000 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2018 | 3/3 | SYR4 |
| Toluene | 34 µg/L 3.4% of the EPA limit 1000 µg/L Highest in the city: SUNRISE HILL ESTATES · 100 people · 2019 | 1/3 | SYR4 |
| Arsenic | 12 µg/L 120% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019 | 3/3 | SYR4 |
| Bromoform | 6.68 µg/L No EPA limit set Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019 | 1/3 | SYR4 |
| Chromium | 6.655 µg/L 6.7% of the EPA limit 100 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2018 | 3/3 | SYR4 |
| Dibromochloromethane | 5.46 µg/L No EPA limit set Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 4.8 µg/L 80% of the EPA limit 6 µg/L Highest in the city: SUNRISE HILL ESTATES · 100 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 4.175 µg/L No EPA limit set Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019 | 1/3 | SYR4 |
| Chloroform | 2.01 µg/L No EPA limit set Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.88 µg/L No EPA limit set Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019 | 1/3 | SYR4 |
| Styrene | 1.68 µg/L 1.7% of the EPA limit 100 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.6505 pCi/L 13% of the EPA limit 5 pCi/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2018
Highest in the city: 1.6 pCi/L — SUNRISE HILL ESTATES · 100 people · 2019 | 2/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.5 pCi/L 10% of the EPA limit 15 pCi/L Highest in the city: SUNRISE HILL ESTATES · 100 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 1.285 µg/L No EPA limit set Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2019 | 1/3 | SYR4 |
| Mercury | 0.1965 µg/L 9.8% of the EPA limit 2 µg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2018
Highest in the city: 0.4830 µg/L — SUNRISE HILL ESTATES · 100 people · 2019 | 2/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SOUTH BERWICK WATER DISTRICT · 3,722 people · 2024 | 3/3 | 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 Berwick
| Supplier | Population served |
|---|---|
| SOUTH BERWICK WATER DISTRICT | 3,722 |
| BERWICK WATER DEPARTMENT | 2,845 |
| SUNRISE HILL ESTATES | 100 |
Frequently asked questions about Berwick tap water
Is Berwick tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Berwick. 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 Berwick?
3 public water suppliers report drinking-water monitoring for Berwick, Maine to the EPA. Each is listed above with its population served.
What contaminants are in Berwick's water?
The contaminants EPA monitoring detected in Berwick include Nitrate, Fluoride, Nitrate-Nitrite, Copper, 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.