ITRC's PFAS Team is pleased to announce the release of the newly updated PFAS-1 Technical and Regulatory Guidance Document. This valuable resource was most recently updated in December of 2021, and this new update is dedicated to revisions that clarify information, provide new references for current text, and recognize significant new document releases from federal agencies and state organizations. This update is intended to provide our users with the most relevant current information available. The 500 page document includes extensive information on multiple aspects of PFAS and its management and technical challenges, along with case studies and stakeholder perspectives. The ITRC PFAS team is continuing their work to develop more extensive updates and new content that will be published in 2023.