EPA - Environmental Protection Agency

At the request of the U.S. Navy, the EPA is sampling private drinking water wells in the area of the Willow Grove naval Air Station Joint Base (NAS-JRB) Willow Grove in Horsham PA for perflourinated chemicals (PFCs), including perflourooctane sulfonate (PFOS) and perflourooctanoic acid (PFOA).

The purpose of the sampling is to determine if wells have been impacted by PFOS and PFOA and if additional actions are needed to protect human health and the environment.  Samples taken recently by the Horsham Water and Sewer Authority (HWSA) as part of the federal Unregulated Contaminant Monitoring Rule 3 (UCMR3) shows levels of PFOS above EPA's provisional health advisory level (HAL) in two public supply wells.  These wells have already been taken off-line.  At this time, PFOA has not been detected above the provisional HAL at any of the other HWSA supply wells.

EPA continues to coordinate closely with the U.S. Navy, Pennsylvania Department of Environmental Protection (PADEP), the Centers for Disease Control and Prevention (CDC) Agency for Toxic Substances and Disease Registry (ATSDR) and HWSA to ensure that public health is protected.

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