HEMLOCK HAVEN
PWS ID: NH1053020 · PORTSMOUTH, New Hampshire 03801
Population Served
207
Total Violations
49
Health-Based Violations
24
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 83
- County
- Rockingham
- School/Daycare
- No
- MCL Violations
- 24
- Monitoring Violations
- 21
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 20 | 1991 |
| Nitrate | MR | 10 | 1995 |
| Lead and Copper Rule | MR | 7 | 2021 |
| Coliform (TCR) | MR | 4 | 2005 |
| Revised Total Coliform Rule | MCL | 4 | 2023 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.