Chlorine (MRDL) violations in Massachusetts
7 active public water systems in Massachusetts had a Chlorine (MRDL) violation in the past three years. What Chlorine (MRDL) is and why it matters.
Systems with a Chlorine (MRDL) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Barre Water Department Barre · Worcester County |
2,610 | 5 | 0 | |
|
Millbury Ind. Park/ Park Hill Village Millbury · Worcester County |
400 | 5 | 0 | |
|
Millville Elementary School Millville · Worcester County |
400 | 3 | 0 | |
|
Masters Academy International Stow · Middlesex County |
225 | 4 | 0 | |
|
Four Mile Village Boxford · Essex County |
133 | 4 | 2 | |
|
The Appleworks Harvard · Worcester County |
36 | 1 | 0 | |
|
Ashby Market Ashby · Middlesex County |
25 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Chlorine (MRDL), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Chlorine (MRDL) alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Massachusetts records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.