What was found in Dover'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 | 4280 µg/L 43% of the EPA limit 10000 µg/L Main supplier: AQUARION WATER COMPANY (DOVER) · 1,929 people · 2018
Highest in the city: 7180 µg/L — OLD FARM ROAD WATER TRUST · 40 people · 2019 | 3/5 | SYR4 |
| Barium | 100 µg/L 5% of the EPA limit 2000 µg/L Main supplier: AQUARION WATER COMPANY (DOVER) · 1,929 people · 2017 | 2/5 | SYR4 |
| TTHM | 16.2 µg/L 20% of the EPA limit 80 µg/L Main supplier: AQUARION WATER COMPANY (DOVER) · 1,929 people · 2018
Highest in the city: 53.65499999999997 µg/L — MEADOWBROOK WATER TRUST · 57 people · 2019 | 3/5 | SYR4 |
| Copper | 20 µg/L 1.5% of the EPA limit 1300 µg/L Main supplier: AQUARION WATER COMPANY (DOVER) · 1,929 people · 2013 | 1/5 | SYR4 |
| Bromodichloromethane | 18.52499999999999 µg/L No EPA limit set Highest in the city: MEADOWBROOK WATER TRUST · 57 people · 2019 | 2/5 | SYR4 |
| Dibromochloromethane | 16.614999999999995 µg/L No EPA limit set Highest in the city: MEADOWBROOK WATER TRUST · 57 people · 2019 | 2/5 | SYR4 |
| Chloroform | 14.734999999999996 µg/L No EPA limit set Highest in the city: MEADOWBROOK WATER TRUST · 57 people · 2019 | 2/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.0950000000000002 µg/L 1.8% of the EPA limit 60 µg/L Main supplier: AQUARION WATER COMPANY (DOVER) · 1,929 people · 2018
Highest in the city: 9.125 µg/L — MEADOWBROOK WATER TRUST · 57 people · 2019 | 3/5 | SYR4 |
| Bromoform | 4.729999999999998 µg/L No EPA limit set Highest in the city: MEADOWBROOK WATER TRUST · 57 people · 2019 | 2/5 | SYR4 |
| Dichloroacetic Acid | 4.165 µg/L No EPA limit set Highest in the city: MEADOWBROOK WATER TRUST · 57 people · 2019 | 2/5 | SYR4 |
| Dibromoacetic Acid | 2.9949999999999997 µg/L No EPA limit set Highest in the city: MEADOWBROOK WATER TRUST · 57 people · 2019 | 2/5 | SYR4 |
| Trichloroacetic Acid | 2.5549999999999997 µg/L No EPA limit set Highest in the city: MEADOWBROOK WATER TRUST · 57 people · 2019 | 2/5 | SYR4 |
| Monochloroacetic Acid | 1.56 µg/L No EPA limit set Highest in the city: MEADOWBROOK WATER TRUST · 57 people · 2019 | 1/5 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Highest in the city: GLEN RIDGE RESIDENTS TRUST · 131 people · 2014 | 2/5 | SYR4 |
| Lead | 0.0050 mg/L 33% of the EPA limit 0.0150 mg/L Main supplier: AQUARION WATER COMPANY (DOVER) · 1,929 people · 2025
Highest in the city: 0.0067 mg/L — OLD FARM ROAD WATER TRUST · 40 people · 2025 | 5/5 | LCR |
Water suppliers serving Dover
| Supplier | Population served |
|---|---|
| AQUARION WATER COMPANY (DOVER) | 1,929 |
| GLEN RIDGE RESIDENTS TRUST | 131 |
| AQUARION WATER CO. (SPRINGDALE FARMS) | 126 |
| MEADOWBROOK WATER TRUST | 57 |
| OLD FARM ROAD WATER TRUST | 40 |
Frequently asked questions about Dover tap water
Is Dover tap water safe to drink?
EPA testing detected 15 contaminants in the water serving Dover. 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 Dover?
5 public water suppliers report drinking-water monitoring for Dover, Massachusetts to the EPA. Each is listed above with its population served.
What contaminants are in Dover's water?
The contaminants EPA monitoring detected in Dover include Nitrate, Barium, TTHM, Copper, Bromodichloromethane. 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.