WILLIAMSFIELD
PWS ID: IL0950650 · WILLIAMSFIELD, Illinois 61489
Population Served
575
Total Violations
138
Health-Based Violations
20
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 275
- County
- Knox
- School/Daycare
- No
- MCL Violations
- 17
- Monitoring Violations
- 84
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Fluoride | MCL | 13 | 1985 |
| Public Notice | Other | 8 | 2006 |
| Nitrate | MR | 8 | 2004 |
| Coliform (TCR) | MR | 6 | 1999 |
| Xylenes, Total | MR | 4 | 1992 |
| o-Dichlorobenzene | MR | 4 | 1992 |
| p-Dichlorobenzene | MR | 4 | 1992 |
| 1,1-Dichloroethylene | MR | 4 | 1992 |
| trans-1,2-Dichloroethylene | MR | 4 | 1992 |
| 1,1,1-Trichloroethane | MR | 4 | 1992 |
| Carbon tetrachloride | MR | 4 | 1992 |
| 1,2-Dichloropropane | MR | 4 | 1992 |
| Trichloroethylene | MR | 4 | 1992 |
| Tetrachloroethylene | MR | 4 | 1992 |
| CHLOROBENZENE | MR | 4 | 1992 |
| Toluene | MR | 4 | 1992 |
| Coliform (TCR) | MCL | 4 | 1998 |
| 1,2-Dichloroethane | MR | 4 | 1992 |
| Ethylbenzene | MR | 4 | 1992 |
| Styrene | MR | 4 | 1992 |
| Benzene | MR | 4 | 1992 |
| Consumer Confidence Rule | Other | 4 | 2004 |
| cis-1,2-Dichloroethylene | MR | 4 | 1992 |
| LEAD AND COPPER RULE REVISIONS | TT | 3 | 2024 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2025 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.