Proposed Notification & Response Levels for PFHxS in Drinking Water Now Available

PROPOSED NOTIFICATION AND RESPONSE LEVELS FOR PERFLUOROHEXANE SULFONIC ACID (PFHxS) IN DRINKING WATER ARE NOW AVAILABLE

This is a message from the State Water Resources Control Board.

The State Water Board’s Division of Drinking Water (Division) is proposing a notification level of 2 parts per trillion (ppt) and a response level of 20 ppt for perfluorohexane sulfonic acid (PFHxS). These levels are based on a recommendation from the Office of Environmental Health Hazard Assessment (OEHHA), which included review of more than one peer reviewed study.

An informational item on the proposed PFHxS notification and response levels is planned for the State Water Board’s August 16 2022 meeting.

The proposed notification and response levels, the OEHHA recommendation, and links to the studies are available at the Division’s website at https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/NotificationLevels.html.

Proposed PFHxS NL_RL.pdf

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