COGSWELL SPRINGS WATER WORKS
New Hampshire - Community Water System - PWSID: NH1121010
System Information
| PWSID | NH1121010 |
| System Name | COGSWELL SPRINGS WATER WORKS |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 01 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 8, 1979 |
| Last Reported | Feb 19, 2026 |
Location & Contact
| State | New Hampshire |
| City | HENNIKER |
| ZIP Code | 03242 |
| Address | 18 DEPOT HILL RD |
| Organization | COGSWELL SPRINGS WATER WORKS |
| Phone | - |
Population & Service
| Population Served | 3,000 |
| Service Connections | 581 |
Drinking Water Violations (42)
This water system has 42 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec 30, 2019 | - | MR | No | No | - | TT | - | Resolved | Jan 27, 2020 | - | |
| Dec 30, 2019 | - | MR | No | No | - | TT | - | Resolved | Jan 27, 2020 | - | |
| Jun 8, 2017 | - | MR | No | Yes | - | - | - | Resolved | Jun 22, 2017 | - | |
| Jun 8, 2017 | - | MR | No | Yes | - | - | - | Resolved | Jun 22, 2017 | - | |
| Jun 8, 2017 | - | MR | No | Yes | - | - | - | Resolved | Jun 22, 2017 | - | |
| Jun 8, 2017 | - | MR | No | Yes | - | - | - | Resolved | Jun 22, 2017 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Aug 1, 2010 | Aug 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2010 | - | |
| Aug 1, 2010 | Aug 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2010 | - | |
| Aug 1, 2010 | Aug 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2010 | - | |
| Aug 1, 2010 | Aug 31, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2010 | - | |
| Jul 1, 2010 | - | Other | No | No | - | - | - | Resolved | Aug 5, 2010 | - | |
| Jul 1, 2010 | - | Other | No | No | - | - | - | Resolved | Aug 5, 2010 | - | |
| Apr 1, 2010 | Apr 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2010 | - | |
| Apr 1, 2010 | Apr 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2010 | - | |
| Apr 1, 2010 | Apr 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2010 | - | |
| Apr 1, 2010 | Apr 30, 2010 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2010 | - | |
| Apr 1, 2010 | - | MR | No | Yes | - | - | - | Resolved | Oct 11, 2010 | - | |
| Apr 1, 2010 | - | MR | No | Yes | - | - | - | Resolved | Oct 11, 2010 | - | |
| Apr 1, 2010 | - | MR | No | Yes | - | - | - | Resolved | Oct 11, 2010 | - | |
| Apr 1, 2010 | - | MR | No | Yes | - | - | - | Resolved | Oct 11, 2010 | - | |
| Sep 1, 2008 | Sep 30, 2008 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2008 | - | |
| Sep 1, 2008 | Sep 30, 2008 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2008 | - | |
| Sep 1, 2008 | Sep 30, 2008 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2008 | - | |
| Sep 1, 2008 | Sep 30, 2008 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2008 | - | |
| Oct 1, 2004 | Oct 31, 2004 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2004 | - | |
| Oct 1, 2004 | Oct 31, 2004 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2004 | - | |
| Oct 1, 2004 | Oct 31, 2004 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2004 | - | |
| Oct 1, 2004 | Oct 31, 2004 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2004 | - | |
| Aug 1, 1994 | Aug 31, 1994 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1994 | - | |
| Aug 1, 1994 | Aug 31, 1994 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1994 | - | |
| Aug 1, 1994 | Aug 31, 1994 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1994 | - | |
| Mar 1, 1991 | Mar 31, 1991 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 1991 | - | |
| Mar 1, 1991 | Mar 31, 1991 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 1991 | - | |
| Mar 1, 1991 | Mar 31, 1991 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 1991 | - | |
| Mar 1, 1991 | Mar 31, 1991 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 1991 | - | |
| Mar 1, 1991 | Mar 31, 1991 | MCL | Yes | No | - | 5% of samples | - | Resolved | Mar 31, 1991 | - | |
| - | - | - | No | No | - | - | - | - | - | - | |
| - | - | - | No | No | - | - | - | - | - | - |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.