All water systems in Pennsylvania
7,658 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Pawc Pocono District Monroe County |
17,860 | 0 | 0 | |
|
Shippensburg Boro Water Auth Cumberland County |
17,800 | 2 | 0 | |
|
Meadville Area Water Authority Crawford County |
17,339 | 1 | 0 | |
|
PA Amer Water CO Ellwood Cty Lawrence County |
17,200 | 1 | 0 | |
|
Phoenixville Water Dept Chester County |
16,599 | 8 | 0 | |
|
Robinson Twp Muni Auth Allegheny County |
16,354 | 4 | 0 | |
|
Highridge Water Auth Westmoreland County |
16,000 | 5 | 0 | |
|
Upper Southampton Mun Auth Bucks County |
16,000 | 3 | 0 | |
|
Red Lion Municipal Authority York County |
15,882 | 4 | 0 | |
|
Slippery Rock Muni Auth Butler County |
15,778 | 3 | 0 | |
|
Mun Water Auth of Aliquippa Beaver County |
15,685 | 7 | 0 | |
|
Aqua PA Susquehanna Division Bradford County |
15,569 | 2 | 1 | |
|
PA American Water Berwick Columbia County |
15,282 | 1 | 0 | |
|
MT Joy Boro Auth Lancaster County |
15,261 | 1 | 0 | |
|
Creswell Heights JT Auth Beaver County |
15,000 | 1 | 0 | |
|
Perkasie Regional Authority Bucks County |
15,000 | 0 | 0 | |
|
Warwick Twp Water & Sewer Auth Bucks County |
14,699 | 3 | 1 | |
|
PA American Water CO Warren Warren County |
14,650 | 0 | 0 | |
|
Swt Main System Lehigh County |
14,500 | 4 | 0 | |
|
Kutztown Borough Water Berks County |
14,200 | 0 | 0 | |
|
Clearfield Municipal Auth Clearfield County |
14,000 | 2 | 0 | |
|
Emmaus Borough Public Water Lehigh County |
14,000 | 1 | 0 | |
|
Huntingdon Boro Water Dept Huntingdon County |
13,776 | 2 | 0 | |
|
Harrison Twp Water Auth Allegheny County |
13,411 | 1 | 0 | |
|
Morrisville Munic Authority Bucks County |
13,342 | 3 | 2 | |
|
Shillington Muni Auth Berks County |
13,300 | 2 | 0 | |
|
Boro of Waynesboro Franklin County |
13,200 | 4 | 0 | |
|
Whitehall Twp Authority Lehigh County |
13,063 | 0 | 0 | |
|
E Stroudsburg Boro Water Dept Monroe County |
13,000 | 2 | 0 | |
|
Aqua PA Hatboro Montgomery County |
12,901 | 1 | 0 | |
|
Quakertown Boro Bucks County |
12,800 | 3 | 0 | |
|
Bear Valley Joint Auth Franklin County |
12,589 | 1 | 1 | |
|
PA Amer Water CO Brownell Lackawanna County |
12,560 | 0 | 0 | |
|
Summit Township Water Authorit Erie County |
12,500 | 2 | 0 | |
|
Gettysburg Muni Auth Adams County |
12,425 | 1 | 0 | |
|
Dallastown Yoe Water Auth York County |
12,300 | 3 | 0 | |
|
Paw Huntsville Luzerne County |
11,987 | 0 | 0 | |
|
South Middleton Twp Water Auth Cumberland County |
11,695 | 6 | 0 | |
|
Findlay Twp Municipal Auth Allegheny County |
11,460 | 6 | 0 | |
|
Pa-American Water Co-Connellsv Fayette County |
11,425 | 0 | 0 | |
|
Aqua PA Superior Main System Montgomery County |
11,400 | 1 | 0 | |
|
Humboldt Industrial Park Luzerne County |
11,243 | 5 | 0 | |
|
Municipal Authority Sunbury Northumberland County |
11,043 | 6 | 1 | |
|
MT Penn Boro Muni Auth Berks County |
10,400 | 0 | 0 | |
|
PA American Water CO Clarion Clarion County |
10,372 | 0 | 0 | |
|
Richland Twp Water Authority Allegheny County |
10,190 | 0 | 0 | |
|
Tri Cnty JT Muni Auth Washington County |
10,100 | 7 | 3 | |
|
West Manchester Twp Auth York County |
9,960 | 3 | 0 | |
|
Downingtown Water Authority Chester County |
9,900 | 3 | 0 | |
|
Paw Crystal Lake Luzerne County |
9,773 | 0 | 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.