1,1-Dichloroethylene violations in Pennsylvania
170 active public water systems in Pennsylvania had a 1,1-Dichloroethylene violation in the past three years, 6 of them in the latest quarter of EPA's data. What 1,1-Dichloroethylene is and why it matters.
Systems with a 1,1-Dichloroethylene violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Plumsteadville Shopping Center Bucks County |
400 | 4 | 1 | |
|
Waterford Waterworks Westmoreland County |
389 | 8 | 0 | |
|
Palisades Middle School Bucks County |
366 | 4 | 0 | |
|
Cooperstown Water Company Venango County |
360 | 8 | 0 | |
|
Woodhaven Mobile Home Park Erie County |
350 | 12 | 4 | |
|
Boyertown Earl Elem Sch Berks County |
313 | 3 | 0 | |
|
Ctma Sagamore Armstrong County |
300 | 5 | 0 | |
|
Penn 80 Milton Northumberland County |
300 | 9 | 0 | |
|
Addison Area Water Auth Somerset County |
284 | 7 | 0 | |
|
Belfast Twp Muni Auth Fulton County |
276 | 3 | 0 | |
|
Halifax Village Dauphin County |
272 | 9 | 0 | |
|
Awc Valley Forge Crossing MHP Montgomery County |
250 | 4 | 0 | |
|
Cogan Valley Mobile Home Park Lycoming County |
250 | 10 | 1 | |
|
Green Township MA Cookport Indiana County |
250 | 1 | 0 | |
|
Loysville Youth Dev Ctr Perry County |
249 | 6 | 0 | |
|
Eagle View MHP Adams County |
230 | 4 | 0 | |
|
Cobbs Lake Preserve Wayne County |
200 | 5 | 1 | |
|
Coral Ridge Estates MHP Butler County |
200 | 3 | 0 | |
|
Look Away Golf Club Bucks County |
200 | 4 | 0 | |
|
Pinecrest Village MHP Lycoming County |
195 | 12 | 3 | |
|
Pennex Alum CO York County |
180 | 1 | 0 | |
|
Frosty Mountain Plaza Carbon County |
175 | 6 | 2 | |
|
Bernies Mobile Home Park Butler County |
170 | 8 | 1 | |
|
Millbrook 5r 7 8 Pike County |
169 | 8 | 2 | |
|
Happy Acres Development Lackawanna County |
168 | 12 | 2 | |
|
Vali-View Mobile Home Park Lycoming County |
150 | 11 | 1 | |
|
Early Learning Connections Butler County |
140 | 1 | 0 | |
|
Hazel Hurst Water Company McKean County |
140 | 7 | 1 | |
|
Monument Water Authority Centre County |
140 | 11 | 0 | |
|
Deann Village MHP Dauphin County |
135 | 10 | 0 | |
|
Big Bass Lake Water Assoc. Wayne County |
130 | 10 | 3 | |
|
Bucks Run Apartments Bucks County |
130 | 4 | 0 | |
|
Cherry Hill Mennonite School Berks County |
130 | 3 | 0 | |
|
Ducklings Daycare Chester County |
130 | 4 | 0 | |
|
Ross Elementary School Luzerne County |
130 | 5 | 1 | |
|
Composidie INC Westmoreland County |
129 | 4 | 1 | |
|
Hemlock Point Pike County |
125 | 4 | 1 | |
|
Sunrise Lake Section 9 Pike County |
125 | 7 | 3 | |
|
Sunrise Lakes Sec 12 Pike County |
125 | 8 | 4 | |
|
Brookside Commons Crawford County |
125 | 10 | 0 | |
|
Perryville Water Association Clarion County |
120 | 3 | 0 | |
|
Evergreen Community Charter Monroe County |
112 | 4 | 0 | |
|
Delaware Plaza Pike County |
107 | 7 | 1 | |
|
Colony Cove East & South HOA Pike County |
101 | 3 | 0 | |
|
Alphabet Garden Childcare Bucks County |
100 | 6 | 0 | |
|
Centre County MHC LLC Centre County |
100 | 10 | 0 | |
|
Cross Station Mobile Home Comm Erie County |
100 | 6 | 0 | |
|
Darway Healthcare & Rehab Sullivan County |
100 | 7 | 1 | |
|
Devon Creek Development Lancaster County |
100 | 3 | 0 | |
|
Whispering Woods Beaver County |
100 | 6 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved 1,1-Dichloroethylene, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not 1,1-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 Pennsylvania 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.