ITRC’s PFAS Team is pleased to announce the release of the updated PFAS-1 Technical and Regulatory Guidance Document. This update includes a brand new section on Surface Water Quality and significant revisions for Ecological Risk Assessment. Other sections of the document have also been selected for additional content, including information in Chemistry and Terminology, Best Management Practices for Firefighting Foams, Phase Partitioning, PFAS Uptake into Plants, Ecological Toxicology, and Site Characterization.