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 | 2024-01-01 → 2024-06-30 |
| TT | Health-based | Resolved | 2024-01-01 → 2024-06-30 |
| MR | Monitoring | Unaddressed | 2025-12-30 |
| Other | Monitoring | Resolved | 2023-07-01 |
| Other | Monitoring | Resolved | 2023-07-01 |
| Other | Monitoring | Resolved | 2021-07-01 |
| Other | Monitoring | Resolved | 2021-07-01 |
| MR | Monitoring | Resolved | 2019-09-29 |
| MR | Monitoring | Resolved | 2019-09-29 |
| MR | Monitoring | Resolved | 2016-12-01 → 2017-02-28 |
PFAS detected
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 99.72 µg/L 7.7% of the EPA limit 1300 µg/L
worst single sample: 223.6 µg/L | 177/194 | SYR4 | 2013–2019 |
| Chloroform | 56.955 µg/L No EPA limit set
worst single sample: 59.7 µg/L | 130/185 | SYR4 | 2012–2019 |
| Bromodichloromethane | 13.28 µg/L No EPA limit set
worst single sample: 15.72 µg/L | 129/185 | SYR4 | 2012–2019 |
| Dibromochloromethane | 5.418 µg/L No EPA limit set
worst single sample: 6.87 µg/L | 129/185 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 22.365 µg/L No EPA limit set
worst single sample: 25 µg/L | 128/128 | SYR4 | 2012–2019 |
| TTHM | 72.37 µg/L 90% of the EPA limit 80 µg/L
worst single sample: 74.79 µg/L | 128/128 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 45.285 µg/L 75% of the EPA limit 60 µg/L
worst single sample: 53.4 µg/L | 128/128 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 23.285 µg/L No EPA limit set
worst single sample: 29.7 µg/L | 128/128 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 5.2095 µg/L No EPA limit set
worst single sample: 5.77 µg/L | 62/128 | SYR4 | 2012–2019 |
| Bromoform | 1.74 µg/L No EPA limit set
worst single sample: 2.18 µg/L | 41/185 | SYR4 | 2012–2019 |
| Nitrate | 4984.5 µg/L 50% of the EPA limit 10000 µg/L
worst single sample: 6690 µg/L | 30/30 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 27/27 | LCR | 2025 |
| Lead | 13.965 µg/L 93% of the EPA limit 15 µg/L
worst single sample: 22.8 µg/L | 20/190 | SYR4 | 2013–2019 |
| Dibromoacetic Acid | 1.4955 µg/L No EPA limit set
worst single sample: 1.52 µg/L | 8/128 | SYR4 | 2012–2019 |
| Arsenic | 2.559 µg/L 26% of the EPA limit 10 µg/L
worst single sample: 2.61 µg/L | 4/4 | SYR4 | 2014–2017 |
| Barium | 582.2 µg/L 29% of the EPA limit 2000 µg/L
worst single sample: 593 µg/L | 4/4 | SYR4 | 2014–2017 |
| Mercury | 0.0746 µg/L 3.7% of the EPA limit 2 µg/L
worst single sample: 0.0750 µg/L | 3/3 | SYR4 | 2014 |
| Monobromoacetic Acid | 12.899 µg/L No EPA limit set
worst single sample: 14.2 µg/L | 3/128 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 2720 µg/L 27% of the EPA limit 10000 µg/L
worst single sample: 2760 µg/L | 3/3 | SYR4 | 2012 |
| Combined Uranium | 2.6275 µg/L 8.8% of the EPA limit 30 µg/L
worst single sample: 2.69 µg/L | 2/2 | SYR4 | 2014 |
| Gross Alpha, Excl. Radon And U | 4.575 pCi/L 31% of the EPA limit 15 pCi/L
worst single sample: 4.68 pCi/L | 2/2 | SYR4 | 2014 |
| Beryllium, Total | 0.0520 µg/L 1.3% of the EPA limit 4 µg/L | 1/4 | SYR4 | 2014–2017 |
| Selenium | 1.74 µg/L 3.5% of the EPA limit 50 µg/L | 1/4 | SYR4 | 2014–2017 |
| Tetrachloroethylene | 2.8 µg/L 56% of the EPA limit 5 µg/L | 1/57 | SYR4 | 2012–2019 |
55 contaminants tested, none detected
Utility contact
Frequently asked questions about Montclair Water Bureau
Is Montclair Water Bureau tap water safe to drink?
EPA monitoring detected 29 contaminants in Montclair Water Bureau'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 Montclair Water Bureau's water?
EPA monitoring detected Copper, Chloroform, Bromodichloromethane, Dibromochloromethane, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.
How many people does Montclair Water Bureau serve?
Montclair Water Bureau reports serving 40,150 people in New Jersey, per its EPA record.
Has Montclair Water Bureau had any water quality violations?
The EPA has 50 violations on file for Montclair Water Bureau, of which 2 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.