COLBY BROOK ESTATES
PWS ID: NH0773020 · EPSOM, New Hampshire 03234
Population Served
68
Total Violations
177
Health-Based Violations
30
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 27
- County
- Merrimack
- School/Daycare
- No
- MCL Violations
- 30
- Monitoring Violations
- 126
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 18 | 2013 |
| Arsenic | MR | 12 | 2007 |
| Coliform (TCR) | MCL | 12 | 2014 |
| Consumer Confidence Rule | Other | 8 | 2002 |
| Nitrate | MR | 5 | 1995 |
| 1,2,4-Trichlorobenzene | MR | 5 | 1995 |
| Xylenes, Total | MR | 5 | 1995 |
| o-Dichlorobenzene | MR | 5 | 1995 |
| Vinyl chloride | MR | 5 | 1995 |
| 1,1-Dichloroethylene | MR | 5 | 1995 |
| trans-1,2-Dichloroethylene | MR | 5 | 1995 |
| Carbon tetrachloride | MR | 5 | 1995 |
| Trichloroethylene | MR | 5 | 1995 |
| 1,1,2-Trichloroethane | MR | 5 | 1995 |
| Tetrachloroethylene | MR | 5 | 1995 |
| CHLOROBENZENE | MR | 5 | 1995 |
| Toluene | MR | 5 | 1995 |
| Ethylbenzene | MR | 5 | 1995 |
| Benzene | MR | 5 | 1995 |
| p-Dichlorobenzene | MR | 5 | 1995 |
| 1,1,1-Trichloroethane | MR | 5 | 1995 |
| 1,2-Dichloropropane | MR | 5 | 1995 |
| DICHLOROMETHANE | MR | 5 | 1995 |
| 1,2-Dichloroethane | MR | 5 | 1995 |
| Styrene | MR | 5 | 1995 |
| cis-1,2-Dichloroethylene | MR | 5 | 1995 |
| Coliform (TCR) | MR | 4 | 2013 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.