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 | 1994-01-01 |
| TT | Health-based | Resolved | 1993-07-13 |
| TT | Health-based | Resolved | 1993-07-01 |
| TT | Health-based | Resolved | 1993-07-01 |
| TT | Health-based | Resolved | 1993-07-01 |
| TT | Health-based | Resolved | 1993-07-01 |
| TT | Health-based | Resolved | 1993-07-01 |
| TT | Health-based | Resolved | 1993-07-01 |
| MR | Monitoring | Resolved | 2023-10-01 |
| MR | Monitoring | Resolved | 2023-10-01 |
PFAS detected
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0122 µg/L | 4/4 | 2025 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Bromodichloromethane | 18.7 µg/L No EPA limit set | 128/128 | SYR4 | 2012–2019 |
| Chloroform | 92.1 µg/L No EPA limit set | 128/128 | SYR4 | 2012–2019 |
| TTHM | 114.3 µg/L 143% of the EPA limit, in the worst sample — 80 µg/L | 128/128 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 73.2 µg/L 122% of the EPA limit, in the worst sample — 60 µg/L | 127/128 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 35 µg/L No EPA limit set | 126/128 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 32.6 µg/L No EPA limit set | 125/128 | SYR4 | 2012–2019 |
| Copper | 1730 µg/L 133% of the EPA limit, in the worst sample — 1300 µg/L | 36/60 | SYR4 | 2014–2017 |
| Monochloroacetic Acid | 4.4 µg/L No EPA limit set | 32/128 | SYR4 | 2012–2019 |
| Dibromochloromethane | 4.7 µg/L No EPA limit set | 21/128 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 19/19 | LCR | 2025 |
| Dibromoacetic Acid | 2.4 µg/L No EPA limit set | 14/128 | SYR4 | 2012–2019 |
| Lead | 14.9 µg/L 99% of the EPA limit 15 µg/L | 4/60 | SYR4 | 2014–2017 |
| Monobromoacetic Acid | 7.4 µg/L No EPA limit set | 3/128 | SYR4 | 2012–2019 |
| Lithium | 25.5 µg/L No EPA limit set | 3/4 | UCMR-5 | 2025 |
29 contaminants tested, none detected
Utility contact
Frequently asked questions about Caseyville
Is Caseyville tap water safe to drink?
EPA monitoring detected 15 contaminants in Caseyville'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 Caseyville's water?
EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, Total Haloacetic Acids (HAA5), Dichloroacetic Acid, and others. The full list with the level and data source for each is above.
How many people does Caseyville serve?
Caseyville reports serving 13,798 people in Illinois, per its EPA record.
Has Caseyville had any water quality violations?
The EPA has 45 violations on file for Caseyville, of which 8 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.