Current Sites
Arendtsville
Beaver Falls
Beaver Valley
Charleroi
Chester
Collegeville
Erie
Evansburg UM
Freemansburg
Greensburg
Lancaster
Lewisburg
Marcus Hook
Reading
Slippery Rock
Springville
Swarthmore
York

Former Sites
Allentown
Altoona
Bangor
Centralia
Evansburg SP
Harrisburg
Johnstown
Montoursville
New Garden
Norristown
Pottstown
Scranton
Spring City
Taylor
Trappe
West Chester
Wilkes-Barre

Toxic Pollutants
Monitoring Topics
Air Quality Home

Note: Toxic monitoring is performed by separate agencies in Allegheny and Philadelphia counties.