Nationwide Main Drinking Water Standards for Per

The U.S. Environmental Security Agency is out with a Nationwide Main Drinking Water Regulation (NPDWR) for six PFAS including perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), perfluorononanoic acid (PFNA), hexafluoropropylene oxide dimer acid (HFPO-DA, assuredly diagnosed as GenX Chemical substances), perfluorohexane sulfonic acid (PFHxS), and perfluorobutane sulfonic acid (PFBS).

The proposed PFAS law doesn’t require any depart till it’s far finalized. The EPA anticipates finalizing the law by the dwell of 2023. EPA expects that, if utterly utilized, the rule of thumb will pause thousands of deaths and sever tens of thousands of severe PFAS-attributable ailments.

The EPA is inquiring for public touch upon the proposed law. The public comment period will open following the proposed rule publishing within the Federal Register. Public feedback also could even be supplied within the within the interim at below Docket ID: EPA-HQ-OW-2022-0114. Info on submitting feedback to EPA dockets also could even be came throughout right here.

The EPA has scheduled two informational webinars about the proposed PFAS law on March 16 and March 29. The webinars would be the same, with each and each supposed for particular audiences. Registration is required to support. The webinar recordings and presentation offers will be made readily accessible following the webinars on the gain field. For questions connected to the general public webinars, contact [email protected] 

EPA has furthermore scheduled a public hearing on May perhaps perhaps perhaps furthermore 4 where people of the general public can register to support and provide verbal feedback to EPA on the rule of thumb proposal. Registration is required to support and the last day to register to talk on the hearing is April 28. For questions connected to the general public hearing, contact [email protected] 


The EPA is proposing a Nationwide Main Drinking Water Regulation (NPDWR) to build legally enforceable ranges, known as Most Contaminant Phases (MCLs), for six PFAS in spirited water. PFOA and PFOS as person contaminants, and PFHxS, PFNA, PFBS, and HFPO-DA (typically assuredly known as GenX Chemical substances) as a PFAS mixture. EPA is furthermore proposing successfully being-based, non-enforceable Most Contaminant Level Targets (MCLGs) for these six PFAS. 

Compound Proposed MCLG Proposed MCL (enforceable ranges)
PFOA Zero 4.0 aspects per trillion (furthermore expressed as ng/L)
PFOS Zero 4.0 ppt
PFNA 1.0 (unitless)Hazard Index 1.0 (unitless)Hazard Index
HFPO-DA (typically assuredly known as GenX Chemical substances)

The proposed rule would furthermore require public water systems to:

  • Monitor for these PFAS
  • Issue the general public of the ranges of these PFAS
  • Decrease the ranges of these PFAS in spirited water if they exceed the proposed requirements.

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