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PFAS in Pennsylvania

DEP is working closely with public water systems and local governments across the Commonwealth to address these emerging contaminants. DEP will take immediate steps to mitigate the impact on public health if combined concentrations of PFOA and PFOS exceed the HAL of 70ppt.



  • AVCO-Lycoming NPL Site
  • Penn State Former Fire Training Site


  • High Quality Plating HSCA Site
  • Tobyhanna Army Depot TCE NPL Site
  • Valmont TCE Superfund NPL Site


  • Pittsburgh Air National Guard Base 
  • Pittsburgh Air Reserve Station


  • Letterkenny Army Depot NPL Site
  • Susquehanna Area Regional Airport Authority (HIA) Site 


  • ChemFab NPL Site
  • CRC Industries
  • Easton Road HSCA Site
  • Former Naval Air Station Joint Reserve Base Willow Grove - Horsham (NPL Site)
  • Former Naval Air Warfare Center - Warminster (NPL Site)
  • Horsham Air National Guard Station
  • Lower Darby Creek NPL Site
  • Nike PH 98/99 (Control) - Warrington
  • North Penn Area 5 NPL Site
  • North Penn US Army Reserve Center (Nike PH 91 - Launch)
  • Ridge Run HSCA Site