What was found in Westminster'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 |
|---|---|---|---|
| TTHM | 81.5 µg/L 102% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019
Highest in the city: 92.775 µg/L — LEINO PARK WATER DISTRICT · 120 people · 2019 | 3/3 | SYR4 |
| Chloroform | 65.3 µg/L No EPA limit set Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019
Highest in the city: 75.57 µg/L — LEINO PARK WATER DISTRICT · 120 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 39.32 µg/L 66% of the EPA limit 60 µg/L Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019 | 3/3 | SYR4 |
| Copper | 33 µg/L 2.5% of the EPA limit 1300 µg/L Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019 | 1/3 | SYR4 |
| Trichloroacetic Acid | 22.8 µg/L No EPA limit set Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 20.69 µg/L No EPA limit set Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 15.375 µg/L No EPA limit set Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019
Highest in the city: 15.62 µg/L — LEINO PARK WATER DISTRICT · 120 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 7.837 µg/L No EPA limit set Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 4.0245 µg/L No EPA limit set Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019
Highest in the city: 4.6005 µg/L — HOLMES PARK WATER DISTRICT · 131 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 3.061 µg/L No EPA limit set Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 2.977 µg/L No EPA limit set Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2019 | 3/3 | SYR4 |
| Lead | 0.0035 mg/L 23% of the EPA limit 0.0150 mg/L Main supplier: WESTMINSTER DEPARTMENT OF PUBLIC WORKS · 3,889 people · 2026
Highest in the city: 0.0054 mg/L — LEINO PARK WATER DISTRICT · 120 people · 2024 | 3/3 | LCR |
Water suppliers serving Westminster
| Supplier | Population served |
|---|---|
| WESTMINSTER DEPARTMENT OF PUBLIC WORKS | 3,889 |
| HOLMES PARK WATER DISTRICT | 131 |
| LEINO PARK WATER DISTRICT | 120 |
Frequently asked questions about Westminster tap water
Is Westminster tap water safe to drink?
EPA testing detected 12 contaminants in the water serving Westminster. 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 Westminster?
3 public water suppliers report drinking-water monitoring for Westminster, Massachusetts to the EPA. Each is listed above with its population served.
What contaminants are in Westminster's water?
The contaminants EPA monitoring detected in Westminster include TTHM, Chloroform, Total Haloacetic Acids (HAA5), Copper, Trichloroacetic Acid. 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.