Groundwater Rule (GWR) violations in Pennsylvania
968 active public water systems in Pennsylvania had a Groundwater Rule (GWR) violation in the past three years, 256 of them in the latest quarter of EPA's data. What Groundwater Rule (GWR) is and why it matters.
Systems with a Groundwater Rule (GWR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Bowmansville Travel Plaza Lancaster County |
1,100 | 3 | 0 | |
|
Christiana Muni Water Auth Lancaster County |
1,100 | 2 | 0 | |
|
The Escape Pike County |
1,100 | 6 | 0 | |
|
Sheffield Twp Municipal Auth Warren County |
1,075 | 2 | 0 | |
|
East Brady Water System Clarion County |
1,040 | 2 | 0 | |
|
Grantville MHP Dauphin County |
1,040 | 1 | 0 | |
|
Bendersville Muni Auth Adams County |
1,039 | 6 | 0 | |
|
Bernville Borough Berks County |
1,010 | 1 | 0 | |
|
Borough of Howard Centre County |
1,001 | 4 | 0 | |
|
Rural Valley Water Works Armstrong County |
1,000 | 2 | 0 | |
|
New Berlin Municipal Authority Union County |
990 | 2 | 0 | |
|
Kreamer Mun Auth Snyder County |
980 | 2 | 0 | |
|
Riegelsville Water Authority Bucks County |
980 | 2 | 0 | |
|
New Milford Municipal Auth Susquehanna County |
979 | 2 | 0 | |
|
Trumbauersville Mun Waterworks Bucks County |
974 | 5 | 0 | |
|
Stoneboro Water Works Mercer County |
956 | 5 | 0 | |
|
South Mountain Restoration Ctr Franklin County |
950 | 4 | 1 | |
|
Liverpool Muni Auth Perry County |
934 | 4 | 0 | |
|
Whitetail Ski Resort Franklin County |
912 | 4 | 0 | |
|
Cairnbrook Improvement Assn Somerset County |
910 | 2 | 0 | |
|
Bowmanstown Authority Carbon County |
900 | 4 | 2 | |
|
Icmsa Plumville Indiana County |
883 | 3 | 0 | |
|
Conneaut Lake Borough Wtp Crawford County |
870 | 2 | 0 | |
|
Carrolltown Boro Muni Auth Cambria County |
850 | 3 | 0 | |
|
McAlisterville Area Joint Auth Juniata County |
850 | 3 | 0 | |
|
New Holland Shopping Center Lancaster County |
825 | 3 | 1 | |
|
B Nai B Rith Perlman Camp Wayne County |
800 | 2 | 2 | |
|
Hickory Hills MHC Northampton County |
800 | 2 | 0 | |
|
Possum Valley Muni Auth Adams County |
800 | 3 | 0 | |
|
Windmill Family Restaurant Lancaster County |
800 | 1 | 0 | |
|
Aqua PA White Rock Acres Sys Cumberland County |
790 | 2 | 0 | |
|
West Lebanon Twp Water Supply Lebanon County |
780 | 1 | 0 | |
|
Junction Center Lancaster County |
775 | 1 | 0 | |
|
Eisenhower Water Supply Adams County |
760 | 1 | 0 | |
|
Charles Cole Memorial Hospital Potter County |
750 | 8 | 0 | |
|
Snake Spring Township MA Bedford County |
750 | 2 | 0 | |
|
Monroe County Correctional Fac Monroe County |
740 | 3 | 1 | |
|
Gratz Boro Water Revenue Fund Dauphin County |
738 | 5 | 0 | |
|
Penns Creek Municipal Auth Snyder County |
725 | 10 | 0 | |
|
Warren State Hospital Warren County |
721 | 1 | 0 | |
|
Eldred Twp Munic Auth Jefferson County |
700 | 1 | 0 | |
|
Oak Ridge Authority Centre County |
700 | 5 | 1 | |
|
Summerville Boro Mun Auth Jefferson County |
700 | 6 | 1 | |
|
Wyalusing Municipal Authority Bradford County |
700 | 6 | 0 | |
|
Lawrenceville Boro Water Dept Tioga County |
691 | 9 | 1 | |
|
Frederick Living Montgomery County |
640 | 6 | 1 | |
|
Kidspeace Orchard Hills Camp Lehigh County |
640 | 1 | 0 | |
|
Pine Grove Twp Water System Warren County |
640 | 3 | 0 | |
|
Ulysses Municipal Authority Potter County |
640 | 5 | 1 | |
|
Aqua PA Rivercrest Wyoming County |
625 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Groundwater Rule (GWR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Groundwater Rule (GWR) 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.