Breaking Down EPA’s PFAS Maximum Contaminant Levels

Breaking Down EPA’s PFAS Maximum Contaminant Levels: Under­stand­ing the Basis, Impli­ca­tions, and What’s Next

On-demand webinar Recorded April 2023
This presentation will discuss the EPA's Maximum Contaminant Levels (MCLs) and how they will affect drinking water, existing state regulations, and their potential future impacts.

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The U.S. Envi­ron­men­tal Protection Agency (EPA) has proposed drinking water limits for PFOA and PFOS, as well as four additional analytes tied to adverse health effects. The new maximum contaminant levels (MCLs), represent the U.S. Government’s first enforceable regulatory action to address PFAS.

The proposal, if finalized, specif­i­cally targets PFOA and PFOS as individual cont­a­m­i­nants and will regulate four other PFAS—PFNA, PFHxS, PFBS, and GenX Chemicals—as a mixture.

Proposed Limits:
• PFOA and PFOS: 4 parts per trillion.
PFNA, PFHxS, PFBS, and GenX: Site-specific limitations on any mixture containing one or more of PFNA, PFHxS, PFBS, and/or GenX Chemicals. Potential risk would be assessed using a hazard index calculation, defined in the proposed rule.

It is critical for drinking water suppliers to understand the options available to them, and the treatment efficacy of the available treatment techniques in achieving these PFAS objectives.

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