LOON HOLLOW
PWS ID: NH1168040 · MARCO ISLAND, New Hampshire 34145
Population Served
68
Total Violations
34
Health-Based Violations
13
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- Private
- Connections
- 17
- County
- Grafton
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 13
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 9 | 2014 |
| Coliform (TCR) | MCL | 9 | 2001 |
| Revised Total Coliform Rule | RPT | 8 | 2022 |
| Revised Total Coliform Rule | MON | 4 | 2022 |
| Revised Total Coliform Rule | TT | 4 | 2017 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.