RETZ ADDN IMPROVEMENT ASSOCIATION
PWS ID: IL0995400 · OTTAWA, Illinois 61350
Population Served
168
Total Violations
80
Health-Based Violations
34
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 67
- County
- LaSalle
- School/Daycare
- No
- MCL Violations
- 34
- Monitoring Violations
- 22
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 32 | 2023 |
| Chlorine | MR | 8 | 2021 |
| Consumer Confidence Rule | Other | 8 | 2022 |
| Public Notice | Other | 6 | 2024 |
| TTHM | MR | 4 | 2021 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2021 |
| Coliform (TCR) | MR | 4 | 2012 |
| Lead and Copper Rule | MR | 2 | 2010 |
| Gross Alpha, Excl. Radon and U | MCL | 2 | 2000 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.