As previously reported, in the context of litigation by utilities challenging Maximum Contaminant Levels (“MCLs”) for PFAS in drinking water, the United States Environmental Protection Agency (“EPA”) filed a
Continue Reading Update in PFAS Drinking Water LitigationPFAS Drinking Water Standards Litigation Paused Amid Government Shutdown; Briefing Scheduled for Hazardous Substance Designation Case
By Vanessa Pinto on
On October 3, 2025, the U.S. Court of Appeals for the D.C. Circuit granted EPA’s unopposed motion to hold the PFAS drinking water standards litigation in abeyance due to the…
Continue Reading PFAS Drinking Water Standards Litigation Paused Amid Government Shutdown; Briefing Scheduled for Hazardous Substance Designation CaseEPA’s Rule Agenda Includes Multiple PFAS Initiatives
By Karen H. Davis on
On September 4, 2025, EPA released its Unified Agenda which includes plans for a number of per- and polyfluoroalkyl substances (PFAS) regulatory actions. The PFAS regulatory agenda is consistent with…
Continue Reading EPA’s Rule Agenda Includes Multiple PFAS InitiativesPause Continues in Litigation Over PFAS MCLs and Hazardous Substances Designation
By Vanessa Pinto on
EPA has again obtained extensions of the stays in the litigation challenging the MCLs for six PFAS and the litigation challenging the hazardous substance designation for PFOS and PFOA.
EPA…
Continue Reading Pause Continues in Litigation Over PFAS MCLs and Hazardous Substances DesignationEPA Keeps MCL for PFOA and PFOS, Extends Compliance Deadline, and Intends to Rescind MCL for PFHxS, PFNA, GenX, and PFBS
By Karen H. Davis on
EPA announced on May 14, 2025 that it will maintain the Maximum Contaminant Level (“MCL”), also known as the national primary drinking water standard, for two PFAS, perfluorooctanoic acid (“PFOA”)…
Continue Reading EPA Keeps MCL for PFOA and PFOS, Extends Compliance Deadline, and Intends to Rescind MCL for PFHxS, PFNA, GenX, and PFBSEPA Requests Additional 30-Day Abeyance in PFAS Drinking Water Rule Litigation
By Vanessa Pinto on
On April 8, 2025, the U.S. Environmental Protection Agency (EPA) requested the U.S. Court of Appeals for the D.C. Circuit extend the abeyance in the challenge to EPA’s Final Rule…
Continue Reading EPA Requests Additional 30-Day Abeyance in PFAS Drinking Water Rule LitigationLitigation Over PFAS MCLs on Hold for Now
By Vanessa Pinto on
A federal appeals court has granted the Environmental Protection Agency’s request for a 60-day abeyance in litigation challenging the Maximum Contaminant Levels (MCLs) for six PFAS chemicals.
In a February…
Continue Reading Litigation Over PFAS MCLs on Hold for NowBriefing Underway in Challenge to Maximum Contaminant Limits (MCLs) for PFAS in Drinking Water
By Vanessa Pinto on
Petitioners filed their opening briefs in the consolidated challenge to the Environmental Protection Agency’s (“EPA’s”) Final Rule establishing Maximum Contaminant Levels (“MCLs”) and Maximum Contaminant Level Goals (“MCLGs”) for six…
Continue Reading Briefing Underway in Challenge to Maximum Contaminant Limits (MCLs) for PFAS in Drinking WaterThe Impact of Chevron’s Demise on the Regulation of PFAS
By Karen H. Davis & Vanessa Pinto on
On June 28, 2024, in its decision in Loper Bright Enterprises, et al. v. Raimondo, et al., the U.S. Supreme Court held that its longstanding precedent granting deference to…
Continue Reading The Impact of Chevron’s Demise on the Regulation of PFASFederal Drinking Water Standards for PFAS Will Influence Groundwater Remediation Standards
By Aaron Mapes & Collin Crecco on
As discussed in a previous post, EPA recently issued a final rule establishing drinking water standards, known as maximum contaminant levels (MCLs), for six per- and polyfluoroalkyl substances (PFAS). …
Continue Reading Federal Drinking Water Standards for PFAS Will Influence Groundwater Remediation Standards