Cyanide violations in Pennsylvania
138 active public water systems in Pennsylvania had a Cyanide violation in the past three years. What Cyanide is and why it matters.
Systems with a Cyanide violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Aqua PA Main System Montgomery County |
822,600 | 6 | 0 | |
|
State College Boro Water Auth Centre County |
72,000 | 5 | 0 | |
|
Highland S & W Auth Beaverdam Cambria County |
22,617 | 8 | 0 | |
|
Mun Water Auth of Aliquippa Beaver County |
15,685 | 7 | 0 | |
|
Huntingdon Boro Water Dept Huntingdon County |
13,776 | 2 | 0 | |
|
Municipal Authority Sunbury Northumberland County |
11,043 | 6 | 1 | |
|
Ebensburg Boro Muni Auth Cambria County |
8,500 | 2 | 1 | |
|
Minersville Municipal Water AU Schuylkill County |
7,275 | 5 | 0 | |
|
Blythe Twp Municipal Authority Schuylkill County |
7,100 | 2 | 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 | |
|
Brockway Boro Municipal Auth Jefferson County |
4,384 | 4 | 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 | |
|
Midland Boro Muni Auth Beaver County |
3,100 | 7 | 1 | |
|
Seven Springs Muni Auth Somerset County |
3,000 | 2 | 0 | |
|
Western Clinton CO Mun Auth Clinton County |
2,610 | 9 | 1 | |
|
Johnsonburg Municipal Auth Elk County |
2,413 | 6 | 1 | |
|
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 | |
|
Richfield Area Joint Auth Juniata County |
1,000 | 3 | 1 | |
|
Thompsontown Muni Auth Juniata County |
1,000 | 3 | 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 | |
|
Charles Cole Memorial Hospital Potter County |
750 | 8 | 0 | |
|
Lake Lehman High School Luzerne County |
750 | 6 | 1 | |
|
Hereford Est MHP Berks County |
710 | 2 | 0 | |
|
Summerville Boro Mun Auth Jefferson County |
700 | 6 | 1 | |
|
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 | |
|
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 | |
|
Genesee Twp Water Authority Potter County |
450 | 11 | 1 | |
|
Wattsburg Boro Wtp Erie County |
450 | 4 | 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 |
About this data
A system is counted once if any of its violations in the past three years involved Cyanide, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Cyanide 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.