All water systems in Pennsylvania
7,658 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Slatington Borough Water Sys Lehigh County |
4,450 | 0 | 0 | |
|
Franklin System York Water Franklin County |
4,400 | 5 | 1 | |
|
Southwestern Cambria Cnty Auth Cambria County |
4,400 | 7 | 0 | |
|
Brockway Boro Municipal Auth Jefferson County |
4,384 | 4 | 0 | |
|
West Earl Water Authority Lancaster County |
4,327 | 2 | 0 | |
|
Aqua PA Jenks Twp Wtp Forest County |
4,320 | 1 | 0 | |
|
Pawc Penn Estates Monroe County |
4,300 | 1 | 0 | |
|
West Reading Boro Water Berks County |
4,300 | 0 | 0 | |
|
Union City Municipal Authority Erie County |
4,295 | 6 | 0 | |
|
New Sewickley Twp Muni Auth Beaver County |
4,276 | 0 | 0 | |
|
Caernarvon Twp Auth Berks County |
4,245 | 1 | 0 | |
|
Jackson Twp Water Auth Cambria County |
4,236 | 5 | 0 | |
|
PA Amer Water CO Susquehanna Susquehanna County |
4,230 | 0 | 0 | |
|
Fleetwood Boro Water System Berks County |
4,218 | 3 | 0 | |
|
Akron Borough Lancaster County |
4,200 | 2 | 0 | |
|
Ashland Area Water Authority Schuylkill County |
4,200 | 4 | 0 | |
|
PA American Dilliner System Greene County |
4,200 | 7 | 0 | |
|
Aqua PA INC Treasure Lake Div Clearfield County |
4,155 | 2 | 0 | |
|
Buckingham Twp Furlong Bucks County |
4,150 | 2 | 0 | |
|
Zelienople Boro Butler County |
4,123 | 3 | 1 | |
|
Mansfield Borough Mun Auth Tioga County |
4,100 | 9 | 0 | |
|
Wrightsville Boro Muni Auth York County |
4,076 | 3 | 0 | |
|
East Donegal Lancaster County |
4,048 | 3 | 0 | |
|
Blairsville Muni Auth Indiana County |
4,023 | 5 | 0 | |
|
Knoebels Grove Park Columbia County |
4,000 | 2 | 1 | |
|
Raccoon Creek State Park Beaver County |
4,000 | 6 | 1 | |
|
Tilden Industrial Park Berks County |
4,000 | 1 | 1 | |
|
New Oxford Munci Auth Adams County |
3,963 | 1 | 0 | |
|
Baden Boro Water Dept Beaver County |
3,948 | 1 | 0 | |
|
Shohola Falls Trails End Sys#2 Pike County |
3,933 | 3 | 2 | |
|
Hegins Hubley Authority Schuylkill County |
3,870 | 2 | 0 | |
|
Denver Boro Lancaster County |
3,861 | 3 | 0 | |
|
Mountain Water Assn Fayette County |
3,856 | 6 | 1 | |
|
Masontown Muni Water Works Fayette County |
3,841 | 4 | 0 | |
|
Petroleum Valley Rwa Butler County |
3,800 | 2 | 0 | |
|
Somerset Twp Muni Auth Oakridg Somerset County |
3,800 | 2 | 0 | |
|
Tobyhanna Army Depot Monroe County |
3,800 | 4 | 0 | |
|
Roamingwood Sewer and Water Wayne County |
3,775 | 3 | 0 | |
|
Masonic Homes Lancaster County |
3,707 | 2 | 0 | |
|
Brackenridge Boro Water Dept Allegheny County |
3,700 | 2 | 0 | |
|
Cooper Twp Municipal Auth Clearfield County |
3,700 | 3 | 0 | |
|
Mifflinburg Boro Water Dept Union County |
3,690 | 2 | 0 | |
|
Pleasant Valley Water Auth Fayette County |
3,630 | 3 | 1 | |
|
Aqua PA Perkiomen Township Montgomery County |
3,600 | 0 | 0 | |
|
Onvo Dorrance Sunoco Luzerne County |
3,600 | 2 | 0 | |
|
Middlesex Twp Muni Auth Cumberland County |
3,527 | 2 | 0 | |
|
Eagle Lake Community Assoc Lackawanna County |
3,500 | 3 | 1 | |
|
Radisson Valley Forge Hotel Montgomery County |
3,500 | 1 | 0 | |
|
Veolia Water PA Shavertown Luzerne County |
3,472 | 0 | 0 | |
|
Mountaintop Reg Water Auth Centre County |
3,456 | 3 | 1 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules currently in violation at EPA's latest data refresh.
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.