If you have an MCL violation or potential MCL violation, do the following.
Call MassDEP during work hours: speak to a Drinking Water staff person as indicated below:
To report a Tier I violation after DEP work hours & holidays:
Call the DEP 24-hour emergency number: 888-304-1133
The emergency response person will refer your call to the drinking water person on call in your region.
Boston program lead
Marie Tennant, Marie.Tennant@mass.gov or 617-292-5885
Failure to monitor violations: check violation notice (NON) for PN requirements and/or consult with a Drinking Water staff person.
Massachusetts Public Water Supplier contacts sorted by Town: Public water suppliers contact list