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 | 2026-01-01 → 2026-03-31 |
| MCL | Health-based | Archived | 2026-01-01 → 2026-03-31 |
| MCL | Health-based | Archived | 2026-01-01 → 2026-03-31 |
| MCL | Health-based | Archived | 2026-01-01 → 2026-03-31 |
| MCL | Health-based | Archived | 2026-01-01 → 2026-03-31 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
| MCL | Health-based | Resolved | 2025-07-01 → 2025-09-30 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Bromodichloromethane | 42 µg/L No EPA limit set | 64/64 | SYR4 | 2012–2019 |
| Chloroform | 64.2 µg/L No EPA limit set | 64/64 | SYR4 | 2012–2019 |
| Dibromochloromethane | 24 µg/L No EPA limit set | 64/64 | SYR4 | 2012–2019 |
| TTHM | 133.3 µg/L 167% of the EPA limit, in the worst sample — 80 µg/L | 64/64 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 19.7 µg/L No EPA limit set | 63/63 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 39 µg/L 65% of the EPA limit 60 µg/L | 63/63 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 17.2 µg/L No EPA limit set | 63/63 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 4 µg/L No EPA limit set | 57/63 | SYR4 | 2012–2019 |
| Bromoform | 4.3 µg/L No EPA limit set | 45/64 | SYR4 | 2012–2019 |
| Lead | 0.0041 mg/L 27% of the EPA limit 0.0150 mg/L | 41/41 | LCR | 2025 |
| Copper | 296 µg/L 23% of the EPA limit 1300 µg/L | 15/110 | SYR4 | 2012–2019 |
| Arsenic | 8.46 µg/L 85% of the EPA limit 10 µg/L | 3/3 | SYR4 | 2012–2018 |
| Barium | 29.6 µg/L 1.5% of the EPA limit 2000 µg/L | 3/3 | SYR4 | 2012–2018 |
| Fluoride | 964 µg/L 24% of the EPA limit 4000 µg/L | 3/3 | SYR4 | 2012–2018 |
| Lead | 6.3 µg/L 42% of the EPA limit 15 µg/L | 1/110 | SYR4 | 2012–2019 |
66 contaminants tested, none detected
Utility contact
Frequently asked questions about Millstone Pwd
Is Millstone Pwd tap water safe to drink?
EPA monitoring detected 15 contaminants in Millstone Pwd'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 Millstone Pwd's water?
EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, TTHM, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.
How many people does Millstone Pwd serve?
Millstone Pwd reports serving 5,565 people in Illinois, per its EPA record.
Has Millstone Pwd had any water quality violations?
The EPA has 56 violations on file for Millstone Pwd, of which 27 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.