In a new study appearing in Environmental Science and Technology, researchers found high levels of ultrashort-chain per- and polyfluoroalkyl substances (PFAS) in blood samples taken from Wilmington, N.C. residents between 2010 and 2016. Two ultrashort-chain PFAS—perfluoromethoxyacetic acid (PFMOAA) and trifluoroacetic acid (TFA)—were detected at high levels in almost every sample.