COHASSET WATER DEPT
Massachusetts — Community Water System — PWSID: MA4065000
System Information
| PWSID | MA4065000 |
| System Name | COHASSET WATER DEPT |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 01 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Feb 26, 1979 |
| Last Reported | Mar 17, 2026 |
Location & Contact
| State | Massachusetts |
| City | COHASSET |
| ZIP Code | 02025 |
| Address | 339 KING ST |
| Organization | COHASSET WATER DEPT |
| Phone | 7813830057 |
Population & Service
| Population Served | 7,555 |
| Service Connections | 2,692 |
Drinking Water Violations (64)
This water system has 64 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, 2022 | — | Other | No | No | — | — | — | Resolved | Aug 15, 2022 | — | |
| Jul 1, 2022 | — | Other | No | No | — | — | — | Resolved | Aug 15, 2022 | — | |
| Jun 1, 2021 | Jun 30, 2021 | MR | No | No | — | — | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.7 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.2 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.006 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.007 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.02 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.001 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.05 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.004 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | — | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.1 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.00000003 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.0002 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.4 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.003 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.5 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.04 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.07 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.0002 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.2 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.0005 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.04 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.0002 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.002 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.002 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.00005 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.0004 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.001 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.003 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.05 mg/L | — | Archived | Jun 30, 2021 | — | |
| Apr 1, 2021 | Jun 30, 2021 | MR | No | No | — | 0.0002 mg/L | — | Archived | Jun 30, 2021 | — | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2012 | — | |
| Dec 1, 2012 | Dec 31, 2012 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2012 | — | |
| Dec 1, 2012 | Dec 31, 2012 | Other | No | No | — | 5% of samples | — | Resolved | Dec 31, 2012 | — | |
| Dec 1, 2012 | Dec 31, 2012 | Other | No | No | — | 5% of samples | — | Resolved | Dec 31, 2012 | — | |
| Jan 1, 2010 | — | MR | No | No | — | TT | — | Resolved | Aug 19, 2010 | — | |
| Jan 1, 2010 | — | MR | No | No | — | TT | — | Resolved | Aug 19, 2010 | — | |
| Jul 1, 2008 | Jul 31, 2008 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2008 | — | |
| Jul 1, 2008 | Jul 31, 2008 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2008 | — | |
| Apr 1, 2008 | — | TT | Yes | No | — | TT | — | Resolved | Dec 2, 2008 | — | |
| Apr 1, 2008 | — | TT | Yes | No | — | TT | — | Resolved | Dec 2, 2008 | — | |
| Jun 1, 2000 | Jun 30, 2000 | MR | No | No | — | 5% of samples | — | Archived | Jun 30, 2000 | — | |
| Aug 1, 1996 | Aug 31, 1996 | MCL | Yes | No | — | 5% of samples | — | Archived | Aug 31, 1996 | — | |
| Oct 1, 1994 | Oct 31, 1994 | MR | No | No | — | 5% of samples | — | Archived | Oct 31, 1994 | — | |
| Sep 1, 1994 | Sep 30, 1994 | MR | No | No | — | 5% of samples | — | Archived | Sep 30, 1994 | — | |
| Oct 1, 1991 | Dec 31, 1991 | MR | No | Yes | — | 0.002 mg/L | — | Resolved | Dec 31, 1991 | — | |
| Oct 1, 1991 | Dec 31, 1991 | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Dec 31, 1991 | — | |
| Oct 1, 1991 | Dec 31, 1991 | MR | No | Yes | — | 0.07 mg/L | — | Resolved | Dec 31, 1991 | — |
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.