The U.S. Air Force reported it found the water in wells and groundwater at Luke Air Force Base tested positive for toxic chemicals. The U.S. Air Force report covers Luke AFB and the Gila Bend Air Force Auxiliary Field. Testing was conducted to determine if two chemicals — perfluorooctane sulfonate and perfluorooctanoic acid — from a foam firefighting agent were evident. The foam had an usually high concentration of the two chemicals. The base firefighters began using the foams to fight fires in 1972 and continued to use it until 2013 in fires ranging from F-15s to vehicle fires on base. The drinking water was deemed safe at both locations, but more analyses in area surrounding Luke AFB is pending. Testing continues.