Surface Water Treatment Rule (SWTR) violations in Pennsylvania
153 active public water systems in Pennsylvania had a Surface Water Treatment Rule (SWTR) violation in the past three years, 31 of them in the latest quarter of EPA's data. What Surface Water Treatment Rule (SWTR) is and why it matters.
Systems with a Surface Water Treatment Rule (SWTR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Shamokin Dam Borough Snyder County |
1,700 | 3 | 0 | |
|
Saxton Muni Water Auth Bedford County |
1,675 | 7 | 1 | |
|
Westmoreland Hospital Westmoreland County |
1,500 | 5 | 1 | |
|
Hawthorn Redbank Redbank MA Clarion County |
1,500 | 5 | 1 | |
|
Somerset Twp M a Friedens Somerset County |
1,374 | 2 | 0 | |
|
Benton Municipal Water Auth Columbia County |
1,333 | 2 | 1 | |
|
Ellsworth Boro Water Dept Washington County |
1,250 | 5 | 1 | |
|
Jay Twp Water Authority Elk County |
1,131 | 8 | 0 | |
|
Torrance State Hospital Westmoreland County |
997 | 3 | 0 | |
|
Croyle Twp Water Auth Cambria County |
989 | 5 | 0 | |
|
Millville Municipal Authority Columbia County |
969 | 12 | 1 | |
|
South Mountain Restoration Ctr Franklin County |
950 | 4 | 1 | |
|
Millheim Borough Water Company Centre County |
902 | 13 | 1 | |
|
Parker Area Water Auth Armstrong County |
900 | 3 | 0 | |
|
McAlisterville Area Joint Auth Juniata County |
850 | 3 | 0 | |
|
Virginia Hills PA LLC Allegheny County |
843 | 2 | 0 | |
|
Possum Valley Muni Auth Adams County |
800 | 3 | 0 | |
|
South Park MHC LLC Washington County |
740 | 3 | 0 | |
|
Redwood Estates PA LLC Allegheny County |
725 | 2 | 0 | |
|
Gregg Township Water Authority Centre County |
670 | 10 | 1 | |
|
West Carroll W Auth Bakerton Cambria County |
670 | 7 | 0 | |
|
Petersburg Bor Water Auth Huntingdon County |
650 | 4 | 0 | |
|
Mapleton Muni Water Auth Huntingdon County |
570 | 6 | 1 | |
|
W Carroll Twp W Auth ST Bened Cambria County |
488 | 6 | 0 | |
|
Allensville Muni Auth Mifflin County |
480 | 3 | 0 | |
|
Marianna Muni Water Works Washington County |
480 | 5 | 1 | |
|
ST Petersburg Municipal Water Clarion County |
465 | 7 | 0 | |
|
Appleville Mobile Home Park Chester County |
461 | 2 | 0 | |
|
Toby Water Elk County |
440 | 3 | 0 | |
|
Porter Township Municipal Auth Clinton County |
425 | 2 | 0 | |
|
ST Clairsville Water Company Bedford County |
392 | 5 | 1 | |
|
Icmsa Cherry Tree Indiana County |
375 | 4 | 1 | |
|
Washington Estates II MHC LLC Washington County |
373 | 4 | 0 | |
|
Washington Estates MHC LLC Washington County |
358 | 3 | 0 | |
|
West Buffalo Twp Mun Auth Union County |
333 | 7 | 0 | |
|
Coaldale Six Mile Run Water Bedford County |
320 | 9 | 1 | |
|
Nelson Township Authority Tioga County |
300 | 7 | 1 | |
|
Reserve and Ridge at Hilltown Bucks County |
300 | 3 | 0 | |
|
Driftwood Borough Cameron County |
258 | 3 | 1 | |
|
Madisonburg Water Works Centre County |
250 | 1 | 0 | |
|
Defiance Water Assn Bedford County |
205 | 9 | 1 | |
|
Limestone Twp Mun Auth Union County |
200 | 5 | 0 | |
|
Greater Johnstown WA Saltlick Cambria County |
170 | 9 | 0 | |
|
Londonderry Court MHP Chester County |
160 | 5 | 0 | |
|
Four Seasons Resort Washington County |
100 | 2 | 0 | |
|
Raystown Lake Corp 7 Pts Plant Huntingdon County |
100 | 3 | 0 | |
|
Artesian Water PA INC Chester County |
95 | 3 | 1 | |
|
Harshbarger MHP Beaver County |
90 | 6 | 1 | |
|
Centerville Muni Water Auth Bedford County |
75 | 8 | 1 | |
|
Watrous Water Association Tioga County |
75 | 7 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Surface Water Treatment Rule (SWTR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Surface Water Treatment Rule (SWTR) 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.