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 |
|---|---|---|---|---|
|
Newmanstown Water Auth Lebanon County |
2,335 | 1 | 0 | |
|
Aqua PA Factoryville Wyoming County |
2,323 | 1 | 0 | |
|
Leesport Borough Berks County |
2,300 | 1 | 0 | |
|
Oley Twp Muni Auth Berks County |
2,204 | 3 | 0 | |
|
Borough of Dublin Bucks County |
2,200 | 2 | 1 | |
|
Alburtis Borough Authority Lehigh County |
2,117 | 2 | 0 | |
|
Bcwsa Solebury Bucks County |
2,100 | 2 | 1 | |
|
Saint Francis University Cambria County |
2,072 | 3 | 0 | |
|
Topton Boro Water Supply Berks County |
2,069 | 3 | 0 | |
|
Desales University Lehigh County |
2,000 | 1 | 0 | |
|
Duncannon Muni Water Perry County |
2,000 | 2 | 0 | |
|
McConnellsburg Boro Muni Auth Fulton County |
2,000 | 9 | 0 | |
|
Mars Borough Water Works Butler County |
1,956 | 2 | 0 | |
|
Weaverland Valley Blue Ball Lancaster County |
1,946 | 2 | 0 | |
|
Centre Hall Boro Water Dept Centre County |
1,900 | 4 | 0 | |
|
Beccaria Coalport Irvona M a Clearfield County |
1,875 | 1 | 0 | |
|
E Armstrong Cnty Muni Auth Armstrong County |
1,875 | 6 | 0 | |
|
Industry Boro Muni Auth Beaver County |
1,865 | 3 | 0 | |
|
Patton Boro Water Dept Cambria County |
1,805 | 3 | 0 | |
|
Adamstown Borough Lancaster County |
1,800 | 1 | 0 | |
|
East Berlin Area Joint Auth Adams County |
1,750 | 4 | 1 | |
|
North Warren Muni Authority Warren County |
1,749 | 5 | 0 | |
|
Reade Twp Muni Auth Cambria County |
1,746 | 3 | 0 | |
|
Waterside Loysburg Water Suppl Bedford County |
1,724 | 4 | 0 | |
|
Mont Alto Municipal Authority Franklin County |
1,705 | 3 | 0 | |
|
Clymer Boro Muni Auth Indiana County |
1,700 | 2 | 0 | |
|
US Army Garrison Cumberland County |
1,700 | 4 | 0 | |
|
Elverson Water Company Chester County |
1,641 | 3 | 0 | |
|
Leacock Twp Mun Auth Lancaster County |
1,640 | 2 | 0 | |
|
Bedford Twp Muni Auth Bedford County |
1,626 | 1 | 0 | |
|
Jennerstown Muni Auth Somerset County |
1,625 | 1 | 0 | |
|
Brady Twp Water Association Clearfield County |
1,570 | 4 | 0 | |
|
Delta Boro Water Sys York County |
1,400 | 5 | 1 | |
|
Knox Water Works Clarion County |
1,380 | 2 | 0 | |
|
Aqua PA Tanglewood Lakes Pike County |
1,321 | 2 | 1 | |
|
Roulette Twp Water Authority Potter County |
1,300 | 7 | 1 | |
|
Terre Hill Borough Lancaster County |
1,295 | 1 | 0 | |
|
Plumstead Twp Summer Hill Mead Bucks County |
1,284 | 4 | 0 | |
|
Lancaster County Bible Church Lancaster County |
1,254 | 2 | 0 | |
|
Indian Lake Boro Waterworks Somerset County |
1,246 | 2 | 0 | |
|
Rock Spring Water CO Centre County |
1,212 | 3 | 1 | |
|
Arendtsville Muni Water Sys Adams County |
1,200 | 2 | 0 | |
|
Cowanshan Yatesboro Numine Sys Armstrong County |
1,200 | 2 | 0 | |
|
Fredericksburg Water Auth Lebanon County |
1,200 | 2 | 0 | |
|
Hornings Market of Myerstown Lebanon County |
1,200 | 3 | 0 | |
|
Orbisonia Rockhill JT Mun Auth Huntingdon County |
1,200 | 4 | 1 | |
|
Parkhouse Nursing & Rehab Ctr Montgomery County |
1,200 | 3 | 0 | |
|
Springboro Area Water Auth Crawford County |
1,175 | 2 | 0 | |
|
Jay Twp Water Authority Elk County |
1,131 | 8 | 0 | |
|
Bessemer Borough Water Dept Lawrence County |
1,100 | 1 | 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.