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Concentration profiles of neutral PFAS measured in air samples in 11 homes during the first sampling visit. The label “no filter” refers to total-air samples, and “pre-filtered” refers to gas-phase samples. The bar showing the results for “Lit. data” is based on multiple studies.16–18,20–25 MeFOSA was not detected in any samples and, therefore, not shown. Results are shown in the order in which samples were collected at the homes.
