OAK OPENINGS - MALLARD LAKE
PWS ID: OH4838612 · TOLEDO, Ohio 43615
Population Served
100
Total Violations
104
Health-Based Violations
45
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- Private
- Connections
- 2
- County
- Lucas
- School/Daycare
- No
- MCL Violations
- 45
- Monitoring Violations
- 56
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 39 | 2013 |
| Coliform (TCR) | MCL | 35 | 2014 |
| Revised Total Coliform Rule | MCL | 10 | 2018 |
| Revised Total Coliform Rule | MON | 9 | 2019 |
| Nitrate | MR | 4 | 1998 |
| E. COLI | MR | 4 | 2013 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.