All water systems in Pennsylvania
7,658 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Southwestern PA Water Auth Greene County |
40,200 | 3 | 0 | |
|
Northampton Boro Muni Auth Northampton County |
40,000 | 1 | 0 | |
|
Oakmont Water Authority Allegheny County |
39,901 | 0 | 0 | |
|
Newtown Artesian Water CO Bucks County |
38,500 | 1 | 0 | |
|
Moon Twp Muni Auth Allegheny County |
38,000 | 4 | 0 | |
|
Penn State Univ Centre County |
37,000 | 2 | 0 | |
|
PA American Coatesville Chester County |
36,960 | 2 | 0 | |
|
Northampton Bucks CO Mun Auth Bucks County |
36,750 | 4 | 0 | |
|
Pottstown Borough Water Auth Montgomery County |
36,000 | 3 | 0 | |
|
Warminster Municipal Authority Bucks County |
36,000 | 2 | 0 | |
|
Aqua PA Uwchlan Chester County |
35,518 | 0 | 0 | |
|
North Fayette Cnty Muni Auth Fayette County |
35,409 | 2 | 0 | |
|
PA American Water CO Yardley Bucks County |
33,171 | 0 | 0 | |
|
West Cnty Muni Auth-McKeesport Allegheny County |
32,644 | 3 | 0 | |
|
Schuylkill CO Mun Auth Schuylkill County |
31,850 | 2 | 0 | |
|
Chambersburg Boro Water Sys Franklin County |
31,048 | 1 | 0 | |
|
PA American White Deer Northumberland County |
30,209 | 0 | 0 | |
|
Brodhead Creek Reg Water Auth Monroe County |
30,000 | 1 | 0 | |
|
Latrobe Muni Auth Westmoreland County |
30,000 | 2 | 0 | |
|
Mifflin Cnty Muni Auth Mifflin County |
29,432 | 1 | 0 | |
|
Veolia Water PA INC Bloomsburg Columbia County |
29,382 | 0 | 0 | |
|
Aqua PA Bristol Bucks County |
28,727 | 1 | 0 | |
|
Paw Penn District Berks County |
28,508 | 0 | 0 | |
|
Guilford Water Auth Franklin County |
28,135 | 3 | 1 | |
|
Plum Boro Muni Auth Allegheny County |
27,500 | 2 | 0 | |
|
Auth of Boro of Charleroi Washington County |
27,000 | 3 | 0 | |
|
Pittsburgh Intl Airport Allegheny County |
26,915 | 5 | 0 | |
|
Carlisle Water Trmt Plt Cumberland County |
26,000 | 3 | 0 | |
|
Horsham Water&sewer Authority Montgomery County |
26,000 | 5 | 0 | |
|
Columbia Water CO Lancaster County |
25,200 | 1 | 0 | |
|
Paw Glen Alsace Div Berks County |
24,951 | 0 | 0 | |
|
Ephrata Area Joint Authority Lancaster County |
24,500 | 3 | 0 | |
|
Falls Twp Water & Sewer Dept Bucks County |
24,400 | 2 | 0 | |
|
Pawc Blue Mountain Northampton County |
23,763 | 0 | 0 | |
|
Pa-American Water Uniontown Fayette County |
23,125 | 0 | 0 | |
|
Highland S & W Auth Beaverdam Cambria County |
22,617 | 8 | 0 | |
|
Muhlenberg Twp Muni Auth Berks County |
22,400 | 4 | 0 | |
|
PA American Water Co-Indiana D Indiana County |
22,360 | 0 | 0 | |
|
Nwwa Warrington Township Bucks County |
21,588 | 3 | 0 | |
|
Dover Twp Water Sys York County |
21,097 | 1 | 0 | |
|
East Hempfield Water Auth Lancaster County |
20,988 | 2 | 0 | |
|
Paw Philipsburg Centre County |
20,865 | 0 | 0 | |
|
Ambler Boro Water Dept Montgomery County |
20,000 | 2 | 0 | |
|
ST Marys Area Water Auth Elk County |
19,588 | 4 | 0 | |
|
Ambridge Water Auth Beaver County |
19,500 | 6 | 0 | |
|
Western Allegheny County Mun a Allegheny County |
19,031 | 2 | 0 | |
|
Center Twp Water Auth Beaver County |
19,000 | 4 | 0 | |
|
Elizabethtown Area Water Lancaster County |
19,000 | 1 | 0 | |
|
Bradford City Water Authority McKean County |
18,500 | 6 | 1 | |
|
Fox Chapel Auth Allegheny County |
18,500 | 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.