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 |
|---|---|---|---|
| Other | Monitoring | Resolved | 2018-07-01 |
| Other | Monitoring | Resolved | 2018-07-01 |
| MR | Monitoring | Resolved | 2014-12-30 |
| MR | Monitoring | Resolved | 2014-12-30 |
| MR | Monitoring | Resolved | 2014-04-01 → 2014-06-30 |
| MR | Monitoring | Resolved | 2014-04-01 → 2014-06-30 |
| MR | Monitoring | Resolved | 2014-04-01 → 2014-06-30 |
| MR | Monitoring | Resolved | 2014-04-01 → 2014-06-30 |
| Other | Monitoring | Resolved | 2013-12-13 |
| Other | Monitoring | Unaddressed | 2013-09-11 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Bromodichloromethane | 12.05 µg/L No EPA limit set
worst single sample: 14 µg/L | 60/60 | SYR4 | 2012–2019 |
| Chloroform | 66.09 µg/L No EPA limit set
worst single sample: 73 µg/L | 60/60 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 19.43 µg/L No EPA limit set
worst single sample: 23 µg/L | 60/60 | SYR4 | 2012–2019 |
| TTHM | 81.005 µg/L 101% of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 88 µg/L | 60/60 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 50.15 µg/L 84% of the EPA limit 60 µg/L
worst single sample: 56 µg/L | 60/60 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 30.335 µg/L No EPA limit set
worst single sample: 33 µg/L | 60/60 | SYR4 | 2012–2019 |
| Dibromochloromethane | 2 µg/L No EPA limit set
worst single sample: 3 µg/L | 58/60 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 3 µg/L No EPA limit set
worst single sample: 4 µg/L | 52/60 | SYR4 | 2012–2019 |
| Copper | 99 µg/L 7.6% of the EPA limit 1300 µg/L
worst single sample: 140 µg/L | 23/24 | SYR4 | 2014–2017 |
| Dibromoacetic Acid | 1 µg/L No EPA limit set | 10/60 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 10/10 | LCR | 2023 |
| Lead | 9.3 µg/L 62% of the EPA limit 15 µg/L
worst single sample: 10 µg/L | 3/24 | SYR4 | 2014–2017 |
2 contaminants tested, none detected
Utility contact
Frequently asked questions about Aquarion-East Derby
Is Aquarion-East Derby tap water safe to drink?
EPA monitoring detected 12 contaminants in Aquarion-East Derby'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 Aquarion-East Derby's water?
EPA monitoring detected Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does Aquarion-East Derby serve?
Aquarion-East Derby reports serving 1,101 people in Connecticut, per its EPA record.
Has Aquarion-East Derby had any water quality violations?
The EPA has 32 violations on file for Aquarion-East Derby, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.