NEPONSET
PWS ID: IL0110700 · NEPONSET, Illinois 61345
Population Served
427
Total Violations
1,195
Health-Based Violations
657
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 200
- County
- Bureau
- School/Daycare
- No
- MCL Violations
- 655
- Monitoring Violations
- 275
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 414 | 2013 |
| Gross Alpha, Excl. Radon and U | MCL | 229 | 2012 |
| Public Notice | Other | 187 | 2025 |
| Coliform (TCR) | MR | 55 | 2015 |
| Combined Radium (-226 and -228) | MR | 27 | 2010 |
| Consumer Confidence Rule | Other | 21 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 17 | 2004 |
| Coliform (TCR) | MCL | 12 | 2010 |
| Xylenes, Total | MR | 9 | 1993 |
| o-Dichlorobenzene | MR | 9 | 1993 |
| 1,1-Dichloroethylene | MR | 9 | 1993 |
| 1,1,1-Trichloroethane | MR | 9 | 1993 |
| Carbon tetrachloride | MR | 9 | 1993 |
| 1,2-Dichloropropane | MR | 9 | 1993 |
| Trichloroethylene | MR | 9 | 1993 |
| CHLOROBENZENE | MR | 9 | 1993 |
| Toluene | MR | 9 | 1993 |
| Ethylbenzene | MR | 9 | 1993 |
| trans-1,2-Dichloroethylene | MR | 9 | 1993 |
| Benzene | MR | 9 | 1993 |
| Combined Uranium | MR | 9 | 2010 |
| p-Dichlorobenzene | MR | 9 | 1993 |
| cis-1,2-Dichloroethylene | MR | 9 | 1993 |
| Tetrachloroethylene | MR | 9 | 1993 |
| Styrene | MR | 9 | 1993 |
| Lead and Copper Rule | MR | 8 | 2021 |
| 1,2-Dichloroethane | MR | 8 | 1993 |
| Chlorine | MR | 4 | 2015 |
| Fluoride | MR | 3 | 1999 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.