SHANNON
PWS ID: IL0150300 · SHANNON, Illinois 61078
Population Served
801
Total Violations
391
Health-Based Violations
346
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 390
- County
- Carroll
- School/Daycare
- No
- MCL Violations
- 346
- Monitoring Violations
- 20
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 254 | 2020 |
| Gross Alpha, Excl. Radon and U | MCL | 46 | 2020 |
| Nitrate | MCL | 32 | 1995 |
| Barium | MCL | 14 | 1990 |
| Coliform (TCR) | MR | 10 | 2002 |
| Lead and Copper Rule | MR | 5 | 2022 |
| Chlorine | MR | 4 | 2023 |
| Consumer Confidence Rule | Other | 2 | 2022 |
| 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.