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 |
|---|---|---|---|
| TT | Health-based | Resolved | 1992-01-01 |
| TT | Health-based | Resolved | 1992-01-01 |
| TT | Health-based | Resolved | 1992-01-01 |
| TT | Health-based | Resolved | 1992-01-01 |
| TT | Health-based | Resolved | 1992-01-01 |
| TT | Health-based | Archived | 1992-01-01 → 2001-05-23 |
| TT | Health-based | Archived | 1992-01-01 → 2001-05-23 |
| MR | Monitoring | Resolved | 2021-12-30 |
| Other | Monitoring | Resolved | 2021-01-21 |
| Other | Monitoring | Resolved | 2021-01-21 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 1152 µg/L 89% of the EPA limit 1300 µg/L
worst single sample: 1530 µg/L | 129/132 | SYR4 | 2014–2019 |
| Dibromochloromethane | 7.4 µg/L No EPA limit set
worst single sample: 14 µg/L | 93/104 | SYR4 | 2012–2019 |
| Bromodichloromethane | 13 µg/L No EPA limit set
worst single sample: 16 µg/L | 90/104 | SYR4 | 2012–2019 |
| Chloroform | 48.65 µg/L No EPA limit set
worst single sample: 70 µg/L | 84/104 | SYR4 | 2012–2019 |
| TTHM | 59.3 µg/L 74% of the EPA limit 80 µg/L
worst single sample: 77 µg/L | 78/78 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 18 µg/L No EPA limit set
worst single sample: 20 µg/L | 71/78 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 42 µg/L 70% of the EPA limit 60 µg/L
worst single sample: 46 µg/L | 71/78 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 24 µg/L No EPA limit set
worst single sample: 26 µg/L | 71/78 | SYR4 | 2012–2019 |
| Nitrate | 3110 µg/L 31% of the EPA limit 10000 µg/L
worst single sample: 3290 µg/L | 56/56 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 2 µg/L No EPA limit set | 55/78 | SYR4 | 2012–2019 |
| Lead | 18 µg/L 120% of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 65 µg/L | 37/132 | SYR4 | 2014–2019 |
| Dibromoacetic Acid | 2.5 µg/L No EPA limit set
worst single sample: 5 µg/L | 36/78 | SYR4 | 2012–2019 |
| Bromoform | 8.4 µg/L No EPA limit set
worst single sample: 21 µg/L | 34/104 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 3085.5 µg/L 31% of the EPA limit 10000 µg/L
worst single sample: 3290 µg/L | 28/28 | SYR4 | 2012–2019 |
| Lead | 0.0031 mg/L 21% of the EPA limit 0.0150 mg/L | 20/20 | LCR | 2025 |
| Barium | 58.3 µg/L 2.9% of the EPA limit 2000 µg/L
worst single sample: 59 µg/L | 8/8 | SYR4 | 2014–2017 |
| Fluoride | 83 µg/L 2.1% of the EPA limit 4000 µg/L
worst single sample: 90 µg/L | 8/8 | SYR4 | 2014–2017 |
| Chromium | 1.9 µg/L 1.9% of the EPA limit 100 µg/L
worst single sample: 2 µg/L | 3/8 | SYR4 | 2014–2017 |
| Combined Radium (-226 And -228) | 2.89 pCi/L 58% of the EPA limit 5 pCi/L
worst single sample: 2.9 pCi/L | 2/3 | SYR4 | 2016–2019 |
| Combined Uranium | 5.43 µg/L 18% of the EPA limit 30 µg/L
worst single sample: 5.6 µg/L | 2/3 | SYR4 | 2016–2019 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set | 1/78 | SYR4 | 2012–2019 |
| Lithium | 9.17 µg/L No EPA limit set | 1/10 | UCMR-5 | 2024 |
80 contaminants tested, none detected
Utility contact
Frequently asked questions about Aquarion-Ridgefield
Is Aquarion-Ridgefield tap water safe to drink?
EPA monitoring detected 29 contaminants in Aquarion-Ridgefield'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-Ridgefield's water?
EPA monitoring detected Copper, Dibromochloromethane, Bromodichloromethane, Chloroform, TTHM, and others. The full list with the level and data source for each is above.
How many people does Aquarion-Ridgefield serve?
Aquarion-Ridgefield reports serving 7,476 people in Connecticut, per its EPA record.
Has Aquarion-Ridgefield had any water quality violations?
The EPA has 79 violations on file for Aquarion-Ridgefield, of which 7 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.