CHELSEA WATER DEPT. (MWRA)
Massachusetts - Community Water System - PWSID: MA3057000
System Information
| PWSID | MA3057000 |
| System Name | CHELSEA WATER DEPT. (MWRA) |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| 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 | CHELSEA |
| ZIP Code | 02150 |
| Address | 500 BROADWAY SUITE 310 |
| Organization | CHELSEA WATER DEPT.(MWRA) |
| Phone | 6174664200 |
Population & Service
| Population Served | 38,319 |
| Service Connections | 5,100 |
Drinking Water Violations (34)
This water system has 34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2016 | - | MR | No | No | - | TT | - | Resolved | Jun 29, 2016 | - | |
| Jul 1, 2016 | - | MR | No | No | - | TT | - | Resolved | Jun 29, 2016 | - | |
| Jan 1, 2010 | - | TT | Yes | No | - | TT | - | Resolved | Apr 12, 2011 | - | |
| Jan 1, 2010 | - | TT | Yes | No | - | TT | - | Resolved | Apr 12, 2011 | - | |
| Jan 1, 2007 | - | TT | Yes | No | - | TT | - | Resolved | Jun 4, 2008 | - | |
| Jan 1, 2007 | - | TT | Yes | No | - | TT | - | Resolved | Jun 4, 2008 | - | |
| Jan 1, 1999 | - | TT | Yes | No | - | TT | - | Resolved | Feb 28, 2000 | - | |
| Jan 1, 1999 | - | TT | Yes | No | - | TT | - | Resolved | Feb 28, 2000 | - | |
| Jan 1, 1997 | - | TT | Yes | No | - | TT | - | Resolved | Mar 18, 1998 | - | |
| Jan 1, 1997 | - | TT | Yes | No | - | TT | - | Resolved | Mar 18, 1998 | - | |
| Jul 1, 1996 | Jul 31, 1996 | MCL | Yes | No | - | 5% of samples | - | Archived | Jul 31, 1996 | - | |
| Nov 1, 1995 | Nov 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Nov 30, 1995 | - | |
| Oct 1, 1995 | Oct 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1995 | - | |
| Oct 1, 1995 | Oct 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Oct 31, 1995 | - | |
| Sep 1, 1995 | Sep 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Sep 30, 1995 | - | |
| Sep 1, 1995 | Sep 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Sep 30, 1995 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1995 | - | |
| Aug 1, 1995 | Aug 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Aug 31, 1995 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Jul 31, 1995 | - | |
| Jul 1, 1995 | Jul 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Jul 31, 1995 | - | |
| Jun 1, 1995 | Jun 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Jun 30, 1995 | - | |
| Jun 1, 1995 | Jun 30, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | Jun 30, 1995 | - | |
| May 1, 1995 | May 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | May 31, 1995 | - | |
| May 1, 1995 | May 31, 1995 | MCL | Yes | No | - | 5% of samples | - | Archived | May 31, 1995 | - | |
| Jan 1, 1994 | - | TT | Yes | No | - | TT | - | Resolved | Mar 21, 1995 | - | |
| Jan 1, 1994 | - | TT | Yes | No | - | TT | - | Resolved | Mar 21, 1995 | - | |
| Jan 1, 1993 | - | TT | Yes | No | - | TT | - | Resolved | Mar 21, 1995 | - | |
| Jan 1, 1993 | - | TT | Yes | No | - | TT | - | Resolved | Mar 21, 1995 | - | |
| Jan 1, 1992 | May 5, 2000 | TT | Yes | No | - | - | - | Archived | May 5, 2000 | - | |
| Jan 1, 1992 | - | TT | Yes | No | - | TT | - | Resolved | Mar 21, 1995 | - | |
| Jan 1, 1992 | - | TT | Yes | No | - | TT | - | Resolved | Mar 21, 1995 | - | |
| Apr 1, 1991 | Apr 30, 1991 | MCL | Yes | No | - | 5% of samples | - | Archived | Apr 30, 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.