GREAT HOLLOW LAKE
PWS ID: CT0859134 · MONROE, Connecticut 06468
Population Served
35
Total Violations
33
Health-Based Violations
14
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- Local
- Connections
- 4
- County
- Fairfield
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 12
- Treatment Tech Violations
- 10
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | TT | 10 | 2022 |
| Revised Total Coliform Rule | MON | 8 | 2023 |
| E. COLI | MR | 4 | 2024 |
| Revised Total Coliform Rule | MCL | 4 | 2021 |
| Public Notice | Other | 4 | 2023 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.