Data is for manuscript entitled "PFAS Quantitation with Diffusive Gradients in Thin-Film Passive Samplers: Capturing Time-Weighted Average Concentrations Around Current Maximum Contaminant Levels". This dataset is not publicly accessible because: The data was not generated by EPA. It can be accessed by contacting the corresponding author. It can be accessed through the following means: Contact the manuscript corresponding author: Julian L. Fairey at julianf@uark.edu. Format: N/A. This dataset is associated with the following publication: Harris, B., S. Hodges, D. Wahman, L. Haupert, J. Chimka, and J. Fairey. PFAS Quantitation with Diffusive Gradients in Thin-Film Passive Samplers: Capturing Time-Weighted Average Concentrations Around Current Maximum Contaminant Levels to Facilitate Compliance. Environmental Science: Advances. Royal Society of Chemistry, London, UK, 300: 125918, (2026).