All water systems in Pennsylvania
7,658 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Suburban Lock Haven Water Auth Clinton County |
9,700 | 4 | 0 | |
|
Icmsa Crooked Creek Indiana County |
9,638 | 5 | 0 | |
|
Oil City Venango County |
9,608 | 0 | 0 | |
|
Veolia Middletown Dauphin County |
9,600 | 2 | 0 | |
|
Aqua Shenandoah Schuylkill County |
9,500 | 1 | 0 | |
|
Bellefonte Borough Water Auth Centre County |
9,500 | 3 | 0 | |
|
Myerstown Water Auth Lebanon County |
9,500 | 2 | 0 | |
|
Windber Area Auth Somerset County |
9,463 | 6 | 0 | |
|
Lititz Boro Lancaster County |
9,397 | 0 | 0 | |
|
Lansford Coaldale JT Water Aut Carbon County |
9,300 | 0 | 0 | |
|
Muni Auth of Washington Twp Fayette County |
9,100 | 5 | 0 | |
|
General Authority of Franklin Venango County |
9,096 | 2 | 0 | |
|
Pawc Bangor Northampton County |
9,008 | 0 | 0 | |
|
Lehighton Water Authority Carbon County |
9,000 | 0 | 0 | |
|
Dillsburg Area Authority York County |
8,962 | 1 | 0 | |
|
Aqua PA Friendship Chester County |
8,800 | 0 | 0 | |
|
Doylestown Boro Water Dept Bucks County |
8,700 | 2 | 0 | |
|
Municipal Water Auth Adams Twp Butler County |
8,700 | 2 | 0 | |
|
Dtma Main System Bucks County |
8,655 | 2 | 0 | |
|
Aqua PA Greenville Mercer County |
8,600 | 3 | 0 | |
|
Warwick Twp Lititz Sys Lancaster County |
8,561 | 1 | 0 | |
|
Merck and CO INC Montgomery County |
8,550 | 2 | 0 | |
|
Hollidaysburg Muni Auth Blair County |
8,523 | 2 | 0 | |
|
Salisbury Twp Water System Lehigh County |
8,522 | 0 | 0 | |
|
Ebensburg Boro Muni Auth Cambria County |
8,500 | 2 | 1 | |
|
Wyomissing Boro Water System Berks County |
8,500 | 0 | 0 | |
|
New Holland Borough Lancaster County |
8,490 | 2 | 0 | |
|
Collegeville Trappe Joint Pwd Montgomery County |
8,470 | 1 | 0 | |
|
N Middleton Water Auth Cumberland County |
8,455 | 0 | 0 | |
|
City of Lock Haven Water Dept Clinton County |
8,450 | 6 | 1 | |
|
LV Hospital Cedar Crest Lehigh County |
8,425 | 2 | 2 | |
|
PA American Water Punxsy Jefferson County |
8,419 | 0 | 0 | |
|
Houtzdale Municipal Authority Clearfield County |
8,410 | 2 | 0 | |
|
Hemlock Farms (main) Pike County |
8,321 | 8 | 0 | |
|
Wellsboro Municipal Authority Tioga County |
8,225 | 4 | 0 | |
|
PA American Audubon Montgomery County |
8,200 | 8 | 0 | |
|
Upmc Presbyterian Allegheny County |
8,200 | 2 | 0 | |
|
Aqua PA Spring Run Chester County |
8,151 | 1 | 0 | |
|
Boyertown Muni Auth Berks County |
8,000 | 1 | 0 | |
|
Kittanning Suburb JT Water Aut Armstrong County |
8,000 | 3 | 1 | |
|
Tamaqua Area Water Authority Schuylkill County |
8,000 | 5 | 0 | |
|
Millersville Univ Lancaster County |
7,950 | 2 | 0 | |
|
Brighton Twp Muni Auth Beaver County |
7,920 | 1 | 0 | |
|
Wernersville Muni Water Auth Berks County |
7,920 | 3 | 1 | |
|
Grove City Boro Water Dept Mercer County |
7,871 | 3 | 0 | |
|
Pa-American Water-Brownsville Fayette County |
7,844 | 0 | 0 | |
|
Veolia Water Bethel Delaware County |
7,809 | 0 | 0 | |
|
Conemaugh Twp Muni Auth Somerset County |
7,800 | 11 | 0 | |
|
Edinboro Water Authority Erie County |
7,800 | 3 | 0 | |
|
Municipal Authority of Corry Erie County |
7,800 | 3 | 0 |
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.