Summary statistics of indoor and outdoor collected ionic PFAS where values have been mean field blank subtracted. n.d. indicates non-detect and values with a “<” in front indicate that that PFAS was detected but at concentrations below the MDL. Concentrations below the MDL were not adjusted. This dataset is associated with the following publication: Chang, N., C. Eichler, D. Amparo, J. Zhou, K. Baumann, E. Cohen-Hubal, J. Surratt, G. Morrison, and B. Turpin. Indoor air concentrations of PM2.5 quartz fiber filter-collected ionic PFAS and emissions to outdoor air: findings from the IPA campaign. Environmental Science: Processes & Impacts. Royal Society of Chemistry, Cambridge, UK, 27(6): 1603-1618, (2025).