ELM OAK MUTUAL WATER SYSTEM
PWS ID: IL0975736 · LAKE FOREST, Illinois 60046
Population Served
50
Total Violations
571
Health-Based Violations
442
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 20
- County
- Lake
- School/Daycare
- No
- MCL Violations
- 442
- Monitoring Violations
- 70
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 391 | 2019 |
| Gross Alpha, Excl. Radon and U | MCL | 51 | 2009 |
| Combined Radium (-226 and -228) | MR | 29 | 2020 |
| Coliform (TCR) | MR | 23 | 1992 |
| Public Notice | Other | 16 | 2024 |
| Gross Alpha, Excl. Radon and U | MR | 5 | 1992 |
| Combined Uranium | MR | 5 | 2019 |
| Chlorine | MR | 4 | 2018 |
| Revised Total Coliform Rule | MON | 4 | 2018 |
| Consumer Confidence Rule | Other | 2 | 2012 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.