UNION
PWS ID: IL1110900 · UNION, Illinois 60180
Population Served
594
Total Violations
95
Health-Based Violations
23
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 276
- County
- McHenry
- School/Daycare
- No
- MCL Violations
- 23
- Monitoring Violations
- 31
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 22 | 2009 |
| Consumer Confidence Rule | Other | 11 | 2025 |
| Public Notice | Other | 10 | 2010 |
| Combined Radium (-226 and -228) | MR | 4 | 2005 |
| p-Dichlorobenzene | MR | 3 | 1991 |
| 1,1-Dichloroethylene | MR | 3 | 1991 |
| 1,2-Dichloroethane | MR | 3 | 1991 |
| Barium | MR | 3 | 2003 |
| Benzene | MR | 3 | 1991 |
| Trichloroethylene | MR | 3 | 1991 |
| Carbon tetrachloride | MR | 3 | 1991 |
| 1,1,1-Trichloroethane | MR | 3 | 1991 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2025 |
| Barium | MCL | 1 | 1992 |
| Lead and Copper Rule | MR | 1 | 1994 |
| Coliform (TCR) | MR | 1 | 2000 |
| 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.