Chlorine (MRDL) violations in Pennsylvania
429 active public water systems in Pennsylvania had a Chlorine (MRDL) violation in the past three years, 66 of them in the latest quarter of EPA's data. 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 |
|---|---|---|---|---|
|
Brady Twp Water Association Clearfield County |
1,570 | 4 | 0 | |
|
Westmoreland Hospital Westmoreland County |
1,500 | 5 | 1 | |
|
Saegertown Borough Crawford County |
1,500 | 3 | 0 | |
|
South Side Sch Beaver County |
1,400 | 6 | 1 | |
|
Somerset Twp M a Friedens Somerset County |
1,374 | 2 | 0 | |
|
Cbsd Holicong MS Bucks County |
1,300 | 3 | 0 | |
|
Roulette Twp Water Authority Potter County |
1,300 | 7 | 1 | |
|
Bald Eagle State Park Centre County |
1,276 | 4 | 0 | |
|
Ellsworth Boro Water Dept Washington County |
1,250 | 5 | 1 | |
|
Arendtsville Muni Water Sys Adams County |
1,200 | 2 | 0 | |
|
Wyalusing Area School District Bradford County |
1,200 | 2 | 0 | |
|
Penns Valley Area High School Centre County |
1,170 | 2 | 0 | |
|
Jay Twp Water Authority Elk County |
1,131 | 8 | 0 | |
|
The Escape Pike County |
1,100 | 6 | 0 | |
|
Croyle Twp Water Auth Cambria County |
989 | 5 | 0 | |
|
Trumbauersville Mun Waterworks Bucks County |
974 | 5 | 0 | |
|
Millville Municipal Authority Columbia County |
969 | 12 | 1 | |
|
Stoneboro Water Works Mercer County |
956 | 5 | 0 | |
|
Liverpool Muni Auth Perry County |
934 | 4 | 0 | |
|
Whitetail Ski Resort Franklin County |
912 | 4 | 0 | |
|
Millheim Borough Water Company Centre County |
902 | 13 | 1 | |
|
Pvsd Middle School Monroe County |
890 | 1 | 0 | |
|
Lehman Jackson Elementary Luzerne County |
875 | 6 | 1 | |
|
Conneaut Lake Borough Wtp Crawford County |
870 | 2 | 0 | |
|
Carrolltown Boro Muni Auth Cambria County |
850 | 3 | 0 | |
|
Elk Lake Elementary School Susquehanna County |
850 | 3 | 1 | |
|
McAlisterville Area Joint Auth Juniata County |
850 | 3 | 0 | |
|
Pleasantville Borough Water Venango County |
846 | 4 | 0 | |
|
McClure Municipal Authority Snyder County |
845 | 3 | 0 | |
|
Virginia Hills PA LLC Allegheny County |
843 | 2 | 0 | |
|
Possum Valley Muni Auth Adams County |
800 | 3 | 0 | |
|
Wood Broad Top Wells Jmun Auth Huntingdon County |
800 | 4 | 1 | |
|
South Park MHC LLC Washington County |
740 | 3 | 0 | |
|
Gratz Boro Water Revenue Fund Dauphin County |
738 | 5 | 0 | |
|
Penns Creek Municipal Auth Snyder County |
725 | 10 | 0 | |
|
Redwood Estates PA LLC Allegheny County |
725 | 2 | 0 | |
|
Wyalusing Municipal Authority Bradford County |
700 | 6 | 0 | |
|
Lawrenceville Boro Water Dept Tioga County |
691 | 9 | 1 | |
|
Gregg Township Water Authority Centre County |
670 | 10 | 1 | |
|
West Carroll W Auth Bakerton Cambria County |
670 | 7 | 0 | |
|
Rittenhouse Place Luzerne County |
647 | 7 | 1 | |
|
Barley Creek Brewing CO Monroe County |
600 | 3 | 1 | |
|
Brandywine Wallace Elem Chester County |
600 | 5 | 1 | |
|
Cbsd Gayman ES Bucks County |
600 | 2 | 0 | |
|
Post Consumer Brands Columbia County |
600 | 3 | 0 | |
|
Springton Manor Elementary Chester County |
600 | 1 | 0 | |
|
Clarks Summit State Hospital Lackawanna County |
576 | 7 | 1 | |
|
Glencrest Mobile Home Park Lehigh County |
570 | 3 | 0 | |
|
Lehigh Elementary School Northampton County |
535 | 2 | 0 | |
|
Chadds Ford Elementary School Chester County |
500 | 3 | 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 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.