NAPLATE
PWS ID: IL0990600 · OTTAWA, Illinois 61350
Population Served
465
Total Violations
477
Health-Based Violations
423
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 250
- County
- LaSalle
- School/Daycare
- No
- MCL Violations
- 423
- Monitoring Violations
- 18
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 417 | 2011 |
| Public Notice | Other | 28 | 2011 |
| Coliform (TCR) | MR | 6 | 2008 |
| Gross Alpha, Excl. Radon and U | MCL | 6 | 2009 |
| Combined Radium (-226 and -228) | MR | 5 | 2011 |
| Nitrate | MR | 4 | 2013 |
| Lead and Copper Rule | MR | 2 | 2010 |
| 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.