Tapcensus

cis-1,2-Dichloroethylene violations in Massachusetts

12 active public water systems in Massachusetts had a cis-1,2-Dichloroethylene violation in the past three years. What cis-1,2-Dichloroethylene is and why it matters.

Health effects: Chronic exposure to cis-1,2-dichloroethylene is associated with liver, nervous system, and immune system effects in animal studies. EPA has not classified it as a human carcinogen based on available data. Its detection in water often signals the presence of more acutely toxic parent compounds such as TCE or vinyl chloride.

Systems with a cis-1,2-Dichloroethylene violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Shrewsbury Water Department
Shrewsbury · Worcester County
38,325 1 0
Brewster Water Department
Brewster · Barnstable County
35,000 2 0
Wannacomet Water Company
Nantucket · Nantucket County
27,703 7 2
Acton Water Supply District
Acton · Middlesex County
21,285 2 0
Camp Ramsbottom
Rehoboth · Bristol County
1,000 2 0
Kings Grant Water CO INC
North Attleborough · Bristol County
434 5 2
Pleasant Water
Wellfleet · Barnstable County
200 1 0
Andrews Farm Water Co.,inc.
Boxford · Essex County
150 10 6
The Village Store Bldg.
Boxford · Essex County
150 1 0
First Congregational Church
Plympton · Plymouth County
55 5 1
Business Park West Condominium Trust
Tyngsborough · Middlesex County
30 2 0
Herring Cove Condominiums Trust
Plymouth · Plymouth County
25 3 2
About this data

A system is counted once if any of its violations in the past three years involved cis-1,2-Dichloroethylene, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not cis-1,2-Dichloroethylene 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.