Per- and Polyfluoroalkyl Substances (PFAS)

  • EPA Retains Maximum Contaminant Levels for PFOA, PFOS

    EPA is committed to addressing Per- and Polyfluoroalkyl substances (PFAS) in drinking water while following the law and ensuring that regulatory compliance is achievable for drinking water systems. 

    Read the news release

  • PFAS Explained

    scientist examines sample

    Learn about EPA's current understanding of PFAS and discover steps you can take to reduce PFAS risk.

    Learn about PFAS

  • PFAS Resources, Data and Tools

    Spreadsheet and data

    Find state contacts and discover research, data, and tools related to EPA's understanding of PFAS.

    Find resources and tools

  • Actions to Address PFAS

    A male scientist preparing an assay for testing

    Learn what EPA is doing to address PFAS.

    Learn what EPA is doing
Contact Us About PFOA, PFOS and Other PFAS to ask a question, provide feedback, or report a problem.
Last updated on September 5, 2025