Fluorine measurements for target PFAS and PFAS mixtures, fluorine mass balance calculations, non-targeted compound abundances. This dataset is not publicly accessible because: All data not included in the manuscript supplemental information is property of Harvard University. It can be accessed through the following means: Contact: Elsie Sunderland (ems@seas.harvard.edu). Format: Manuscript supplemental information contains tables of outputs of various assays in terms of concentrations.

This dataset is associated with the following publication: Ruyle, B.J., C.P. Thackray, J. McCord, M. Strynar, K.A. Mauge-Lewis, S.E. Fenton, and E.M. Sunderland. Reconstructing the Composition of Per- and Polyfluoroalkyl Substances in Contemporary Aqueous Film-Forming Foams. Environmental Science & Technology Letters. American Chemical Society, Washington, DC, USA, 8(1): 59-65, (2021).