AIRWAY HEIGHTS, Wash.—Officials from the Fairchild Airforce Base said 21 wells had Perfluorooctanesulfonate (PFOS) and Perfluorooctanoic acid (PFOA)concentrations above the EPA lifetime Health Advisory (HA) levels.

Officials said the contaminated wells were located north of the base. The wells tested on the south side of the base had no detection of PFOS or PFOA

Results showed that there were also 19 wells north of the base with PFOS and PFOA levels below the EPA HA levels. Reports said with owners' permission, the Air Force Civil Engineer Center will continue monitoring those wells to make sure the PFOS/PFOA levels stay below the HA.

"We will continue our goal to follow through with our neighbors to provide the information they rightfully deserve," said Col. Ryan Samuelson, 92nd Air Refueling Wing commander.

Reports said officials from the Airforce Civil Engineer Center began conducting face-to-face notifications to affected residents Thursday.