“The Port of Portland recently detected contaminated soil and groundwater at Portland International Airport, traced to foam used in firefighter training for more than a half-century.

So far, there’s no evidence that PFOS and PFOA have spread very far…The chief concern is that the groundwater contamination might migrate east of the airport, where Portland Water Bureau operates wells that serve as the region’s main backup water supply to the Bull Run Reservoir.”

Read Steve Law’s full coverage for the Portland Tribune.