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EPA Supporting U.S. Navy Response to  Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoic Acid (PFOA) in Private Drinking Water Wells
At the request of the U.S. Navy and the Air National Guard (ANG), the U.S. Environmental Protection Agency (EPA) continues to provide sampling and technical support for private drinking water wells in the Horsham, Warminster and Warrington, Pennsylvania areas for PFOS and PFOA found at the Willow Grove Naval Air Station Joint Reserve Base (NASJRB) in Horsham and the Naval Air Development Center, (NADC) in Warminster.
In May 2016, the EPA established a lifetime health advisory level (HAL) for PFOS and PFOA at 70 parts per trillion. When both PFOS and PFOA are found in drinking water, the combined concentrations of PFOS and PFOA should be compared with the 70 parts per trillion health advisory level.
The lifetime HAL for PFOS and PFOA is a guide for public drinking water systems; it is not a drinking water standard. As EPA continues to study the health effects of PFOS and PFOA, the lifetime HAL was set to protect the most sensitive populations (pregnant women and nursing infants) and therefore is protective of all populations for a life-time of exposure.
For more information about PFOS and PFOA, please visit us at:

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Community Resources

Community involvement is the process of engaging in dialogue and collaboration with community members. The goal of Superfund community involvement is to advocate and strengthen early and meaningful community participation during Superfund cleanups. Read about ways you can participate in EPA’s Community Involvement Program.

EPA celebrates 35 years of the Superfund Program: Read about sites in your states where Superfund has made a difference in protecting human health and the environment.

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Site News Archive

Perfluorinated Chemical in Drinking Water - Questions & Answers - October 2015

Perfluorinated Chemical in Drinking Water - Questions & Answers - February 2015

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