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