JOHN DORR NATURE LAB
PWS ID: CT1500052 · BRONX, Connecticut 10471
Population Served
30
Total Violations
131
Health-Based Violations
25
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Litchfield
- School/Daycare
- No
- MCL Violations
- 25
- Monitoring Violations
- 90
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 25 | 2010 |
| TTHM | MR | 22 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 18 | 2023 |
| Chlorine | MR | 10 | 2023 |
| Public Notice | Other | 8 | 2020 |
| Revised Total Coliform Rule | MON | 8 | 2023 |
| Thallium, Total | MR | 4 | 2020 |
| Antimony, Total | MR | 4 | 2020 |
| Nickel | MR | 4 | 2020 |
| Chromium | MR | 4 | 2020 |
| Cadmium | MR | 4 | 2020 |
| Selenium | MR | 4 | 2020 |
| Barium | MR | 4 | 2020 |
| Arsenic | MR | 4 | 2020 |
| Revised Total Coliform Rule | RPT | 4 | 2020 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.