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 | Archived | 1995-02-01 → 1995-02-28 |
| TT | Health-based | Archived | 1995-02-01 → 1995-02-28 |
| TT | Health-based | Archived | 1995-02-01 → 1995-02-28 |
| TT | Health-based | Archived | 1995-01-01 → 1995-01-31 |
| TT | Health-based | Archived | 1995-01-01 → 1995-01-31 |
| TT | Health-based | Archived | 1995-01-01 → 1995-01-31 |
| TT | Health-based | Archived | 1994-12-01 → 1994-12-31 |
| TT | Health-based | Archived | 1994-12-01 → 1994-12-31 |
| TT | Health-based | Archived | 1994-12-01 → 1994-12-31 |
| TT | Health-based | Archived | 1994-11-01 → 1994-11-30 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 1200 µg/L 92% of the EPA limit 1300 µg/L | 40/40 | SYR4 | 2014–2017 |
| Lead | 520 µg/L 3467% of the EPA limit, in the worst sample — 15 µg/L | 34/40 | SYR4 | 2014–2017 |
| Lead | 0.0039 mg/L 26% of the EPA limit 0.0150 mg/L | 17/17 | LCR | 2025 |
| Nitrate | 660 µg/L 6.6% of the EPA limit 10000 µg/L | 16/16 | SYR4 | 2012–2019 |
| Chloroform | 11.6 µg/L No EPA limit set | 8/8 | SYR4 | 2013–2019 |
| TTHM | 13.7 µg/L 17% of the EPA limit 80 µg/L | 8/8 | SYR4 | 2013–2019 |
| Bromodichloromethane | 2.09 µg/L No EPA limit set | 6/8 | SYR4 | 2013–2019 |
| Nitrate-Nitrite | 530 µg/L 5.3% of the EPA limit 10000 µg/L | 3/3 | SYR4 | 2012–2018 |
| Total Haloacetic Acids (HAA5) | 15.38 µg/L 26% of the EPA limit 60 µg/L | 3/8 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 3.12 µg/L No EPA limit set | 3/8 | SYR4 | 2013–2019 |
| Arsenic | 2.4 µg/L 24% of the EPA limit 10 µg/L | 2/2 | SYR4 | 2014–2017 |
| Barium | 10 µg/L 0.5% of the EPA limit 2000 µg/L | 2/2 | SYR4 | 2014–2017 |
| Dichloroacetic Acid | 5.45 µg/L No EPA limit set | 2/8 | SYR4 | 2013–2019 |
| Fluoride | 1070 µg/L 27% of the EPA limit 4000 µg/L | 2/2 | SYR4 | 2014–2017 |
| Combined Radium (-226 And -228) | 1.015 pCi/L 20% of the EPA limit 5 pCi/L | 1/1 | SYR4 | 2015 |
| Dibromoacetic Acid | 6.81 µg/L No EPA limit set | 1/8 | SYR4 | 2013–2019 |
| Monochloroacetic Acid | 2.26 µg/L No EPA limit set | 1/8 | SYR4 | 2013–2019 |
| Nitrite | 180 µg/L 18% of the EPA limit 1000 µg/L | 1/3 | SYR4 | 2012–2018 |
63 contaminants tested, none detected
Utility contact
Frequently asked questions about Eureka
Is Eureka tap water safe to drink?
EPA monitoring detected 18 contaminants in Eureka'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 Eureka's water?
EPA monitoring detected Copper, Lead, Lead, Nitrate, Chloroform, and others. The full list with the level and data source for each is above.
How many people does Eureka serve?
Eureka reports serving 5,216 people in Illinois, per its EPA record.
Has Eureka had any water quality violations?
The EPA has 116 violations on file for Eureka, of which 54 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.