ROCK CITY
PWS ID: IL1770500 · DAVIS, Illinois 61019
Population Served
313
Total Violations
20
Health-Based Violations
2
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 128
- County
- Stephenson
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 12
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 4 | 2023 |
| Lead and Copper Rule | MR | 4 | 2025 |
| Coliform (TCR) | MR | 3 | 2003 |
| Coliform (TCR) | MCL | 2 | 2000 |
| Consumer Confidence Rule | Other | 2 | 2015 |
| 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.