HILLSBOROUGH WATER WORKS
PWS ID: NH1141010 · HILLSBOROUGH, New Hampshire 03244
Population Served
2,000
Total Violations
737
Health-Based Violations
354
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 907
- County
- Hillsborough
- School/Daycare
- No
- MCL Violations
- 353
- Monitoring Violations
- 376
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 187 | 2014 |
| Total Haloacetic Acids (HAA5) | MCL | 144 | 2014 |
| Coliform (TCR) | MCL | 22 | 2008 |
| Nitrate | MR | 8 | 1994 |
| Coliform (TCR) | MR | 7 | 2005 |
| cis-1,2-Dichloroethylene | MR | 7 | 1996 |
| Xylenes, Total | MR | 7 | 1996 |
| Chromium | MR | 7 | 1996 |
| CYANIDE | MR | 7 | 1996 |
| o-Dichlorobenzene | MR | 7 | 1996 |
| Fluoride | MR | 7 | 1996 |
| p-Dichlorobenzene | MR | 7 | 1996 |
| Mercury | MR | 7 | 1996 |
| Vinyl chloride | MR | 7 | 1996 |
| 1,1-Dichloroethylene | MR | 7 | 1996 |
| Selenium | MR | 7 | 1996 |
| trans-1,2-Dichloroethylene | MR | 7 | 1996 |
| 1,1,1-Trichloroethane | MR | 7 | 1996 |
| Carbon tetrachloride | MR | 7 | 1996 |
| 1,2-Dichloropropane | MR | 7 | 1996 |
| Trichloroethylene | MR | 7 | 1996 |
| 1,1,2-Trichloroethane | MR | 7 | 1996 |
| CHLOROBENZENE | MR | 7 | 1996 |
| Toluene | MR | 7 | 1996 |
| Ethylbenzene | MR | 7 | 1996 |
| Styrene | MR | 7 | 1996 |
| Arsenic | MR | 7 | 1996 |
| 1,2,4-Trichlorobenzene | MR | 7 | 1996 |
| Barium | MR | 7 | 1996 |
| Thallium, Total | MR | 7 | 1996 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.