Screening library of detectable PFAS ions, results from identified PFAS from suspect screening of AFFF materials on the market. This dataset is not publicly accessible because: Data Property of Texas A&M University. It can be accessed through the following means: Contact Ivan Rusyn . Format: Excel. This dataset is associated with the following publication: Luo, Y., N.A. Aly, J. McCord, M. Strynar, W.A. Chiu, J.N. Dodds, E.S. Baker, and I. Rusyn. Rapid Characterization of Emerging Per- and Polyfluoroalkyl Substances in Aqueous Film-Forming Foams Using Ion Mobility Spectrometry–Mass Spectrometry. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 54(23): 15024–15034, (2020).

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).

Supporting information for manuscript, including chromatograms, peak areas, and standard recovery data to support PFAS manuscript. This dataset is associated with the following publication: Sanan, T., and M. Magnuson. Analysis of per- and polyfluorinated alkyl substances (PFAS) of sub-sampled water matrices with online solid phase extraction/isotope dilution tandem mass spectrometry. JOURNAL OF CHROMATOGRAPHY A. Elsevier Science Ltd, New York, NY, USA, 1626: 461324, (2020).

Supporting information for manuscript, including chromatograms, peak areas, and standard recovery data to support PFAS manuscript. This dataset is associated with the following publication: Sanan, T., and M. Magnuson. Analysis of per- and polyfluorinated alkyl substances (PFAS) of sub-sampled water matrices with online solid phase extraction/isotope dilution tandem mass spectrometry. JOURNAL OF CHROMATOGRAPHY A. Elsevier Science Ltd, New York, NY, USA, 1626: 461324, (2020).

CIMS calibration curves for the FTOHs and other PFAS for which standards were available. PFOA signals during calibrations and sampling. CIMS unit mass resolution difference mass spectrum for one commercial sample. Molecular composition assignment isotopic distributions. and a. This dataset is associated with the following publication: Riedel, T., J. Lang, M. Strynar, A. Lindstrom, and J. Offenberg. Gas-Phase Detection of Fluorotelomer Alcohols and Other Oxygenated Per- and Polyfluoroalkyl Substances by Chemical Ionization Mass Spectrometry. Environmental Science & Technology Letters. American Chemical Society, Washington, DC, USA, 6(5): 289-293, (2019).

One phenomenon that has been shown to concentrate and release per- and polyfluoroalkyl substances (PFAS) in surface water is the formation of natural foams. For surface water foams to form, surface active compounds or surfactants must be present in the water along with a source of gas bubbles. Some examples of surface-active compounds include humic and fulvic acids, colloidal particles, and lipids and proteins. The relationship between PFAS and dissolved organic matter (DOM) is important because studies have shown that DOM can affect PFAS fate and bioavailability in aquatic systems and treatment processes. The results from this assessment will improve our understanding of PFAS fate and transport in the environment. Surface water and foam samples were collected from two sub-basins in the Delaware River Basin to compare PFAS, PFAS total oxidizable precursors (TOP), and DOM concentrations and composition in surface water foams to that of underlying bulk water, upstream water, and downstream water. Data were collected in support of the U.S. Geological Survey (USGS) Water Mission Area Integrated Water Availability Assessments program in coordination with the Pennsylvania Department of Environmental Protection (PADEP) and USGS Water Science Centers in Pennsylvania and California.

One phenomenon that has been shown to concentrate and release per- and polyfluoroalkyl substances (PFAS) in surface water is the formation of natural foams. For surface water foams to form, surface active compounds or surfactants must be present in the water along with a source of gas bubbles. Some examples of surface-active compounds include humic and fulvic acids, colloidal particles, and lipids and proteins. The relationship between PFAS and dissolved organic matter (DOM) is important because studies have shown that DOM can affect PFAS fate and bioavailability in aquatic systems and treatment processes. The results from this assessment will improve our understanding of PFAS fate and transport in the environment. Surface water and foam samples were collected from two sub-basins in the Delaware River Basin to compare PFAS, PFAS total oxidizable precursors (TOP), and DOM concentrations and composition in surface water foams to that of underlying bulk water, upstream water, and downstream water. Data were collected in support of the U.S. Geological Survey (USGS) Water Mission Area Integrated Water Availability Assessments program in coordination with the Pennsylvania Department of Environmental Protection (PADEP) and USGS Water Science Centers in Pennsylvania and California.

Chemical ionization mass spectrometry data from thermal treatment of PFOA in EPA's pilot scale Rainbow furnace. Definitions of variables included in dataset. This dataset is associated with the following publication: Rocchio, C., J. Mattila, S. Sharma, J. Krug, G. Kogekar, W. Roberson, J. Offenberg, K. Pennell, W. Linak, and C.F. Goldsmith. Incineration of Perfluorooctanoic Acid Leads to Regeneration of Smaller Perfluorocarboxylic Acids. JOURNAL OF PHYSICAL CHEMISTRY A. American Chemical Society, Washington, DC, USA, 129(35): 8160–8169, (2025).

Data were generated at the University of Florida. This dataset is not publicly accessible because: Data are not owned by EPA/ORD. It can be accessed through the following means: contact the study lead Dr. Timothy Townsend (ttown@ufl.edu). Format: Data were generated at the University of Florida. This dataset is associated with the following publication: Thompson, J., N. Robey, T. Tolaymat, J. Bowden, H.M. Solo-Gabriele, and T. Townsend. Underestimation of Per- and Polyfluoroalkyl Substances in Biosolids: Precursor Transformation During Conventional Treatment. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 57(9): 3825-3832, (2023).

Datafiles in TXT file formats listing PFAS chemicals and a list of all PFAS Chemical Lists publicly available on the CompTox Chemicals Dashboard. This dataset is associated with the following publication: Williams, A., L. Gaines, C. Grulke, C. Lowe, G. Sinclair, V. Samano, I. Thillainadarajah, B. Meyer, G. Patlewicz, and A. Richard. Assembly and Curation of Lists of Per- and Polyfluoroalkyl Substances (PFAS) to Support Environmental Science Research. Frontiers in Environmental Science. Frontiers, Lausanne, SWITZERLAND, 10: 850019, (2022).