NILWOOD
PWS ID: IL1170750 · MODESTO, Illinois 62667
Population Served
1,394
Total Violations
85
Health-Based Violations
27
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 571
- County
- Macoupin
- School/Daycare
- No
- MCL Violations
- 18
- Monitoring Violations
- 43
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Atrazine | MCL | 18 | 1994 |
| Coliform (TCR) | MR | 17 | 2013 |
| Chloramine | MR | 16 | 2025 |
| Revised Total Coliform Rule | MON | 8 | 2025 |
| Interim Enhanced Surface Water Treatment Rule | TT | 5 | 2010 |
| Lead and Copper Rule | TT | 4 | 1999 |
| Consumer Confidence Rule | Other | 4 | 2012 |
| Public Notice | Other | 4 | 2022 |
| Lead and Copper Rule | MR | 2 | 2021 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.