12 TALLWOOD
PWS ID: NH0268140 · LONDONDERRY, New Hampshire 03053
Population Served
70
Total Violations
39
Health-Based Violations
11
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Merrimack
- School/Daycare
- No
- MCL Violations
- 11
- Monitoring Violations
- 10
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 11 | 2025 |
| Revised Total Coliform Rule | RPT | 10 | 2024 |
| Revised Total Coliform Rule | MON | 10 | 2024 |
| Public Notice | Other | 8 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.