OEHHA Draft PHGs for PFOA and PFOS

On July 22, 2021, the California Office of Environmental Health Hazard Assessment (OEHHA) posted as announcement ( pfoa-scrnr072221) to be published in the California Regulatory Notice Register on July 30, 2021.  The notice announces the availability of proposed Public Health Goals (PHGs) for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS).   The deadline to submit public comments will be September 28, 2021.  OEHHA will hold a public workshop on the proposed PHGs on September 28, 2021 from 1:00 pm to 4:00 pm (PT).  The workshop will be held in a virtual format.

The proposed PHGs are as follows:

PFOA – 0.007 parts per trillion (ppt)

PFOS – 1 ppt

The proposed PHGs are based on the one in a million cancer risk estimates.  According to information posted by OEHHA, the PFOA proposed PHG is based on kidney cancer in humans, and the PFOS proposed PHG is based on liver and pancreatic cancer in animal studies.

OEHHA’s draft Technical Support document for the proposed PHGs can be found at the following link:


The draft Technical Support document also includes “….health protective drinking water concentration for noncancer health effects” as follows:

PFOA – 3 ppt

PFOS – 2 ppt

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About Dan Askenaizer

Dr. Askenaizer leads WQTS’ work on regulatory compliance support for many of our water agencies clients. Dr. Askenaizer tracks water quality and treatment regulations at the Federal and State levels and provides regulatory updates to our clients. Dr. Askenaizer has strong expertise in the development of Regulatory Monitoring and Compliance Plans (RMCPs), which he has completed for a number of water agencies. He has also been working on a number of projects dealing with the development of distribution system monitoring plans and review of nitrification control strategies. Prior to joining WQTS, Dr. Askenaizer was the Water Quality Manager for the Glendale Water and Power. Under his leadership, the Water Quality Group conducted a demonstration-scale study of chlorite for nitrification control and a pilot-scale study of biological treatment for removal of nitrate. Dan has 30 years of experience working on projects dealing with regulatory, water quality and public health issues. Dan has given numerous presentations at workshops and round-tables across the country for water utilities. Dan was instrumental in developing and implementing a Mentoring Program for water staff and was involved in a Sustainable Development team.