Per- and Polyfluoroalkyl Substances (PFAS)

Welcome to the Water Boards' Per- and Polyfluoroalkyl Substances (PFAS) webpage

This webpage provides a general background on PFAS, information on where PFAS data is being collected across the state, announcements for current Water Board events, links to past Water Board events, and links to other state entities implementing efforts on PFAS.

The Water Boards' PFAS Team is a group of technical and support staff within the State Water Board Divisions of Drinking Water and Water Quality, and the Regional Water Quality Control Boards. A primary objective of the Team is to provide information and data that is easily accessible and understandable.

This webpage provides a central point where information is communicated to the public regarding PFAS investigative actions conducted, and the results from those actions.

What's New!

NEW! Target Analytical Reporting Limits for PFAS compliance with EPA Method 1633 for Aqueous Samples
UPDATED on November 1, 2023! 3M and DuPont Class Action Lawsuit Settlements Approved by U.S. District Court – Direct Impacts to Legal Rights of Many California Water Providers
- These settlement terms are binding on all California water providers and will result in a waiver of the right to pursue future litigation against 3M and DuPont UNLESS a water provider "opts out" of the settlement by filing a request for exclusion by December 4 and 11, 2023, respectively. An important notice about how these settlements may adversely impact your water system's legal rights is provided here (PFAS: Per- and Polyfluoroalkyl Substances Drinking Water Systems | California State Water Resources Control Board).
- Related Information listed below is also provided at PFAS: Per- and Polyfluoroalkyl Substances Drinking Water Systems | California State Water Resources Control Board:
  - Template Letters to Request Exclusion
  - Affidavits in Support of Request for Exclusion from Settlement Agreement
  - Opt Out Checklists
  - The settling parties have provided information about these settlements at www.pfaswatersettlement.com and water providers will be sent a court ordered notice via e-mail and U.S. mail. Additional information and resources related to these settlements will be provided on this website and through the Division of Drinking Water's email distribution list for water systems.
    The settlement agreements can be viewed at the following links:
NEW! Santa Ana Regional Water Quality Control Board - PFAS website.
ELAP Offering EPA Method 1633 and Draft EPA Method 1621. Apply for ELAP Accreditation.
NEW! Per- and Polyfluoroalkyl Substances (PFAS) Funding
PFAS Strategic Roadmap: EPA’s Commitments to Action 2021-2024
Public Water System and Investigative Order Analytical Results available on the GeoTracker PFAS Mapping Tool
Target Analytical Reporting Limits for PFAS compliance with DoD Table B-15 of QSM, Version 5.3 or later (updated 10/18/23)
Laboratories Accredited by ELAP (Environmental Laboratory Accreditation Program)