PFAS Update: New EPA Drinking Water Health Advisories for Four PFAS Substances


On June 15, 2022, the United States Environmental Protection Agency (“EPA”) issued interim drinking water health advisories (“HA”) for two PFAS substances and final HAs for two other PFAS compounds. These values range from 0.004 ppt (PFOA) to 2,000 ppt (PFBS). The HAs are intended to identify the concentration of chemicals in drinking water at or below the level at which adverse health effects are not anticipated to occur.

Specifically, EPA established the following HA values:

<b>PFAS Substance</b>


<b>Prior Value</b>


PFOA (Perflurooctanic acid)

0.004 ppt

70 ppt

Interim Value

PFOS (Perfluorooctane sufonic acid)

0.02 ppt

70 ppt

Interim Value

Gen X Chemicals (HFPO-DA)

10 ppt


Final Value

PFBS (Perfluorobutane sulfonate)

2,000 ppt


Final Value

The interim HAs for PFOA and PFOS supersede and dramatically reduce EPA’s prior 70 ppt HA for PFOA and PFOS, either individually or combined, which EPA issued in 2016. These interim health advisories for PFOA and PFOS will remain in place until EPA establishes a National Primary Drinking Water Regulation for those compounds.

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JD Supra, 22-06-22