ONEIDA
PWS ID: IL0950400 · ONEIDA, Illinois 61467
Population Served
696
Total Violations
46
Health-Based Violations
26
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 280
- County
- Knox
- School/Daycare
- No
- MCL Violations
- 26
- Monitoring Violations
- 12
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Fluoride | MCL | 13 | 1985 |
| Combined Radium (-226 and -228) | MCL | 13 | 1986 |
| Chlorine | MR | 4 | 2014 |
| Consumer Confidence Rule | Other | 4 | 2023 |
| Coliform (TCR) | MR | 4 | 2014 |
| Fluoride | MR | 3 | 1999 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.