Selenium violations in Pennsylvania
116 active public water systems in Pennsylvania had a Selenium violation in the past three years. What Selenium is and why it matters.
Systems with a Selenium violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Aqua PA Main System Montgomery County |
822,600 | 6 | 0 | |
|
Mun Water Auth of Aliquippa Beaver County |
15,685 | 7 | 0 | |
|
Icmsa Crooked Creek Indiana County |
9,638 | 5 | 0 | |
|
Windber Area Auth Somerset County |
9,463 | 6 | 0 | |
|
Minersville Municipal Water AU Schuylkill County |
7,275 | 5 | 0 | |
|
Indian Creek Valley Water Auth Fayette County |
7,000 | 4 | 0 | |
|
Beaver Boro Muni Auth Beaver County |
5,799 | 9 | 0 | |
|
Mun Auth of Boro of Bedford Bedford County |
5,127 | 4 | 0 | |
|
Northern Cambria Muni Water Cambria County |
4,500 | 5 | 0 | |
|
Ashland Area Water Authority Schuylkill County |
4,200 | 4 | 0 | |
|
Ligonier Twp Muni Auth Westmoreland County |
3,293 | 8 | 0 | |
|
Lykens Boro Auth Dauphin County |
3,220 | 6 | 0 | |
|
Coudersport Boro Authority Potter County |
3,166 | 9 | 1 | |
|
Johnsonburg Municipal Auth Elk County |
2,413 | 6 | 1 | |
|
Saint Francis University Cambria County |
2,072 | 3 | 0 | |
|
Twp of Upper Makefield Bucks County |
1,800 | 6 | 0 | |
|
Chestnut Ridge School District Bedford County |
1,500 | 2 | 0 | |
|
Wasd High School Pike County |
1,456 | 4 | 1 | |
|
Plumstead Twp Summer Hill Mead Bucks County |
1,284 | 4 | 0 | |
|
Peter J. Camiel Service Plaza Chester County |
1,100 | 6 | 1 | |
|
Sandy Lake Boro Mercer County |
1,100 | 5 | 0 | |
|
Polk Center Venango County |
1,058 | 13 | 0 | |
|
Millville Municipal Authority Columbia County |
969 | 12 | 1 | |
|
Millheim Borough Water Company Centre County |
902 | 13 | 1 | |
|
New Hanover Upper Fred E S Montgomery County |
850 | 3 | 0 | |
|
Gilbertsville Elementary Montgomery County |
800 | 3 | 0 | |
|
Paradise Stream Resor Monroe County |
774 | 9 | 3 | |
|
Charles Cole Memorial Hospital Potter County |
750 | 8 | 0 | |
|
Lake Lehman High School Luzerne County |
750 | 6 | 1 | |
|
Summerville Boro Mun Auth Jefferson County |
700 | 6 | 1 | |
|
Penn Township Municipal Auth Snyder County |
672 | 2 | 0 | |
|
Gregg Township Water Authority Centre County |
670 | 10 | 1 | |
|
Jim Thorpe School K to 8 Grade Carbon County |
660 | 3 | 0 | |
|
Maplewood Jr/sr High School Crawford County |
600 | 5 | 1 | |
|
Clarks Summit State Hospital Lackawanna County |
576 | 7 | 1 | |
|
Newell Muni Auth Fayette County |
520 | 4 | 0 | |
|
Maplewood Elementary School Crawford County |
500 | 5 | 1 | |
|
Gov Mifflin Brecknock Elem Sch Berks County |
480 | 4 | 0 | |
|
Brookside Village MHP Columbia County |
475 | 9 | 0 | |
|
Dudley Carbon Coalmont JM Auth Huntingdon County |
403 | 8 | 1 | |
|
Plumsteadville Shopping Center Bucks County |
400 | 4 | 1 | |
|
Ralston Area Joint Authority Lycoming County |
400 | 7 | 2 | |
|
Walmar Manor MHP York County |
400 | 7 | 0 | |
|
Hickory Hill Country Village Erie County |
375 | 9 | 0 | |
|
West Penn Elementary Schuylkill County |
360 | 4 | 0 | |
|
New Oxford Manor MHP Adams County |
350 | 5 | 0 | |
|
Woodhaven Mobile Home Park Erie County |
350 | 12 | 3 | |
|
Coaldale Six Mile Run Water Bedford County |
320 | 9 | 1 | |
|
Boyertown Earl Elem Sch Berks County |
313 | 3 | 0 | |
|
Ctma Sagamore Armstrong County |
300 | 5 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Selenium, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Selenium 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. Retrieved from ECHO on Oct 11, 2026.