HOPKINTON WATER DEPARTMENT
Massachusetts — Community Water System — PWSID: MA2139000
System Information
| PWSID | MA2139000 |
| System Name | HOPKINTON WATER DEPARTMENT |
| 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 | Feb 26, 1979 |
| Last Reported | Mar 17, 2026 |
Location & Contact
| State | Massachusetts |
| City | HOPKINTON |
| ZIP Code | 01748 |
| Address | P.O. BOX 171 |
| Organization | HOPKINTON WATER DEPARTMENT |
| Phone | 5084979740 |
Population & Service
| Population Served | 12,586 |
| Service Connections | 4,377 |
Drinking Water Violations (24)
This water system has 24 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apr 1, 2014 | Jun 30, 2014 | MR | No | No | — | 10 mg/L | — | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | No | — | 10 mg/L | — | Resolved | Jun 30, 2014 | — | |
| 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, 2006 | Oct 31, 2006 | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2006 | — | |
| Oct 1, 2006 | Oct 31, 2006 | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2006 | — | |
| Feb 1, 2005 | Feb 28, 2005 | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 28, 2005 | — | |
| Feb 1, 2005 | Feb 28, 2005 | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 28, 2005 | — | |
| Sep 1, 2004 | Sep 30, 2004 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2004 | — | |
| Sep 1, 2004 | Sep 30, 2004 | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2004 | — | |
| Sep 1, 2004 | Sep 30, 2004 | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2004 | — | |
| Sep 1, 2004 | Sep 30, 2004 | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2004 | — | |
| Sep 1, 2000 | Sep 30, 2000 | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2000 | — | |
| Sep 1, 2000 | Sep 30, 2000 | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 2000 | — | |
| Jan 1, 1999 | — | MR | No | No | — | TT | — | Resolved | Sep 17, 1999 | — | |
| Jan 1, 1999 | — | MR | No | No | — | TT | — | Resolved | Sep 17, 1999 | — | |
| Jul 1, 1998 | — | MR | No | No | — | TT | — | Resolved | Aug 17, 1999 | — | |
| Jul 1, 1998 | — | MR | No | No | — | TT | — | Resolved | Aug 17, 1999 | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | 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.