OASIS MHP
PWS ID: IL0315185 · NORTHBROOK, Illinois 60062
Population Served
3,000
Total Violations
101
Health-Based Violations
20
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 599
- County
- Cook
- School/Daycare
- No
- MCL Violations
- 20
- Monitoring Violations
- 62
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 20 | 1997 |
| Coliform (TCR) | MR | 14 | 1997 |
| Chlorine | MR | 4 | 2011 |
| TTHM | MR | 4 | 2021 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2021 |
| Antimony, Total | MR | 4 | 2020 |
| Beryllium, Total | MR | 4 | 2020 |
| Nickel | MR | 4 | 2020 |
| Selenium | MR | 4 | 2020 |
| Barium | MR | 4 | 2020 |
| Mercury | MR | 4 | 2020 |
| Total Polychlorinated Biphenyls (PCB) | MR | 4 | 2020 |
| Cadmium | MR | 4 | 2020 |
| Thallium, Total | MR | 4 | 2020 |
| 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.