Dover Air Force Base (DAFB) installed house water filtration systems at four off-base properties in Dover, Delaware. The wells supplying water to those properties were found to have levels of PFOS and PFOA in excess of the 70 parts per trillion Health Advisory Level. The properties will continue to receive bottled water until DAFB is able to confirm the efficacy of the filtration systems.
DAFB has been responding to PFAS exceedances in groundwater at the base and surrounding areas since at least 2014. The PFAS levels – some as high as 2.8 million parts per trillion – are believed to be a result of the use of firefighting foam at the base, according to DAFB Remedial Project Manager Joe Kowalski.