Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Archived | 2020-01-01 → 2020-03-31 |
| MCL | Health-based | Archived | 2019-10-01 → 2019-12-31 |
| MCL | Health-based | Archived | 2019-07-01 → 2019-09-30 |
| MCL | Health-based | Archived | 2019-04-01 → 2019-06-30 |
| MCL | Health-based | Archived | 2019-01-01 → 2019-03-31 |
| MCL | Health-based | Archived | 2018-10-01 → 2018-12-31 |
| MCL | Health-based | Archived | 2018-07-01 → 2018-09-30 |
| MCL | Health-based | Archived | 2015-07-01 → 2015-09-30 |
| MCL | Health-based | Archived | 2015-04-01 → 2015-06-30 |
| MCL | Health-based | Resolved | 2011-09-01 → 2011-09-30 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| TTHM | 106.15 µg/L 133% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 168 µg/L | 118/118 | SYR4 | 2012–2019 |
| Bromodichloromethane | 36.04 µg/L No EPA limit set
worst single sample: 49.5 µg/L | 107/107 | SYR4 | 2012–2019 |
| Dibromochloromethane | 31.67 µg/L No EPA limit set
worst single sample: 36.8 µg/L | 107/107 | SYR4 | 2012–2019 |
| Bromoform | 13.095 µg/L No EPA limit set
worst single sample: 14.5 µg/L | 104/107 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 29 µg/L 48% of the EPA limit 60 µg/L
worst single sample: 43 µg/L | 104/117 | SYR4 | 2012–2019 |
| Chloroform | 57.18 µg/L No EPA limit set
worst single sample: 95.4 µg/L | 102/107 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 15.67 µg/L No EPA limit set
worst single sample: 23.1 µg/L | 82/108 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 4.475 µg/L No EPA limit set
worst single sample: 5.9 µg/L | 66/108 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 13.2 µg/L No EPA limit set
worst single sample: 15.7 µg/L | 53/108 | SYR4 | 2012–2019 |
| Nitrate | 1329 µg/L 13% of the EPA limit 10000 µg/L
worst single sample: 1340 µg/L | 32/48 | SYR4 | 2012–2019 |
| Lead | 0.0040 mg/L 27% of the EPA limit 0.0150 mg/L | 19/19 | LCR | 2025 |
| Monochloroacetic Acid | 5.035 µg/L No EPA limit set
worst single sample: 5.8 µg/L | 18/108 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 2.5 µg/L 50% of the EPA limit 5 µg/L
worst single sample: 3.4 µg/L | 16/97 | SYR4 | 2012–2019 |
| Fluoride | 148 µg/L 3.7% of the EPA limit 4000 µg/L
worst single sample: 150 µg/L | 3/9 | SYR4 | 2012–2019 |
| Lithium | 9.58 µg/L No EPA limit set | 2/6 | UCMR-5 | 2024 |
| Ethylbenzene | 4 µg/L 0.6% of the EPA limit 700 µg/L | 1/25 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 1.2 µg/L No EPA limit set | 1/108 | SYR4 | 2012–2019 |
| Xylenes, Total | 19.3 µg/L 0.2% of the EPA limit 10000 µg/L | 1/25 | SYR4 | 2012–2019 |
78 contaminants tested, none detected
Utility contact
Frequently asked questions about Hanover Water Dept
Is Hanover Water Dept tap water safe to drink?
EPA monitoring detected 25 contaminants in Hanover Water Dept's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Hanover Water Dept's water?
EPA monitoring detected TTHM, Bromodichloromethane, Dibromochloromethane, Bromoform, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does Hanover Water Dept serve?
Hanover Water Dept reports serving 14,984 people in Massachusetts, per its EPA record.
Has Hanover Water Dept had any water quality violations?
The EPA has 23 violations on file for Hanover Water Dept, of which 15 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
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.