The PFAS Project Lab

Studying Social, Scientific, and Political Factors of Per- and Polyfluoroalkyl Substances

Warminster, Warrington and Horsham (Bucks County), Pennsylvania

Suspected contamination source: Firefighting foam used at former Naval Air Warfare Center in Warminster and former Naval Air Station Joint Reserve Base in Horsham, along with the active Horsham Air Guard Station and Willow Grove Naval Air Station Joint Reserve Base (NASJRB) (Arazia, 2016)

Perfluorinated compounds were a key ingredient in the firefighting foams used at these bases for decades. EPA data shows samples from the three townships were among the 10 highest for both perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) nationwide.

For more information on Pennsylvania PFAS contamination, The Intelligencer has an ongoing series of articles and information on the investigation.

Additional Resources

Media Coverage:

Full citations are available on the second page of the full contamination site tracker. We ask for your additions, changes, questions and comments be sent to

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