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 |
|---|---|---|---|
| MR | Monitoring | Unaddressed | 2026-01-01 |
| MR | Monitoring | Unaddressed | 2026-01-01 |
| RPT | Monitoring | Resolved | 2025-07-02 |
| RPT | Monitoring | Resolved | 2025-07-02 |
| RPT | Monitoring | Resolved | 2025-07-02 |
| Other | Monitoring | Unaddressed | 2025-07-01 |
| MR | Monitoring | Unaddressed | 2024-10-01 |
| MR | Monitoring | Unaddressed | 2024-10-01 |
| MR | Monitoring | Unaddressed | 2024-10-01 |
| Other | Monitoring | Resolved | 2018-07-01 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Bromodichloromethane | 14.22 µg/L No EPA limit set
worst single sample: 15.7 µg/L | 217/217 | SYR4 | 2012–2019 |
| Chloroform | 33.76 µg/L No EPA limit set
worst single sample: 42.7 µg/L | 217/217 | SYR4 | 2012–2019 |
| Dibromochloromethane | 6.52 µg/L No EPA limit set
worst single sample: 7.69 µg/L | 217/217 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 17.34 µg/L No EPA limit set
worst single sample: 22.4 µg/L | 217/217 | SYR4 | 2012–2019 |
| TTHM | 54.1 µg/L 68% of the EPA limit 80 µg/L
worst single sample: 63.5 µg/L | 217/217 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 32.32 µg/L 54% of the EPA limit 60 µg/L
worst single sample: 42.9 µg/L | 217/217 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 12.03 µg/L No EPA limit set
worst single sample: 26.5 µg/L | 215/217 | SYR4 | 2012–2019 |
| Monobromoacetic Acid | 1.943 µg/L No EPA limit set
worst single sample: 2.3 µg/L | 135/217 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 1.775 µg/L No EPA limit set
worst single sample: 2.02 µg/L | 71/217 | SYR4 | 2012–2019 |
| Lead | 7.005 µg/L 47% of the EPA limit 15 µg/L
worst single sample: 20.7 µg/L | 27/270 | SYR4 | 2014–2019 |
| Copper | 338.05 µg/L 26% of the EPA limit 1300 µg/L
worst single sample: 599 µg/L | 24/270 | SYR4 | 2014–2019 |
| Lead | 0.0111 mg/L 74% of the EPA limit 0.0150 mg/L | 24/24 | LCR | 2026 |
| Monochloroacetic Acid | 9.9635 µg/L No EPA limit set
worst single sample: 11.3 µg/L | 22/217 | SYR4 | 2012–2019 |
31 contaminants tested, none detected
Utility contact
Frequently asked questions about Des Plaines
Is Des Plaines tap water safe to drink?
EPA monitoring detected 13 contaminants in Des Plaines'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 Des Plaines's water?
EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.
How many people does Des Plaines serve?
Des Plaines reports serving 60,675 people in Illinois, per its EPA record.
Has Des Plaines had any water quality violations?
The EPA has 12 violations on file for Des Plaines, of which 0 are health-based (a contaminant limit or required treatment was breached) and 6 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.