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On March 13, the Environmental Protection Agency (EPA) took the long-anticipated step of proposing maximum contaminant level goals (MCLGs), as well as individual maximum contaminant levels (MCLs), for six PFAS compounds under the Safe Drinking Water Act. PFAS are a large family of synthetic chemicals that have been in use since the 1940s. Many PFAS have unique physical and chemical properties that make them highly stable and resistant to degradation in the environment, which is why they are sometimes referred to as “forever chemicals.”…

Continue Reading EPA Advances PFAS Strategic Roadmap With Proposed Drinking Water Standards

On October 28, the EPA published the Final Fifth Drinking Water Contaminant Candidate List. Under the Safe Drinking Water Act (SDWA), the EPA is required to publish a new Contaminant Candidate List (CCL) every five years. The CCL contains a list of contaminants that are currently not subject to any national primary drinking water regulations but are anticipated to occur in public water systems and may require regulation.…

Continue Reading EPA Publishes Final Fifth Drinking Water Contaminant Candidate List (CCL)

The New Jersey Department of Environmental Protection posted interim soil remediation standards for several per- and polyfluoroalkyl substances (collectively PFAS) to include perfluoro nonanoic acid (PFNA), perfluorooctanoic acid (PFOA), perfluoro octane sulfonate (PFOS), and hexafluoropropylene oxide dimer acid and its ammonium salt (GenX). Posted in the October 17 NJ Register, the interim standards pertain to the direct contact and migration to groundwater exposure paths, and apply immediately.…

Continue Reading NJDEP Interim PFAS Soil Remediation Standards

Anna and Dave continue their Missouri Water Seminar PFAS miniseries with Assistant Director of Engineering-Environmental Compliance Jay Hoskins of the Metropolitan St. Louis Sewer District. Jay, Anna, and Dave discuss integrated planning, source control, rate setting, and risk communication in a rapidly changing regulatory environment.…

Continue Reading PFAS in Focus: Wastewater Utility Perspectives From Jay Hoskins, Metropolitan St. Louis Sewer District

Dave and Anna kick off a PFAS podcast series taped on location at the Missouri Water Seminar to provide an on-the-ground perspective of how state and local governments are dealing with the emerging regulatory framework for PFAS. Our first guest — Water Program Director Chris Wieberg of the Missouri Department of Natural Resources — explains how the “Show-Me” state uses data collection, collaboration, and risk communication to advance PFAS regulatory and management efforts statewide.
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Continue Reading PFAS in Focus: Show-Me Insights From Chris Wieberg, Missouri Department of Natural Resources

Today, the U.S. Environmental Protection Agency (EPA) announced that Administrator Regan signed a proposed rule to designate two of the most widely studied per- and polyfluoroalkyl substances (PFAS) as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The proposed designation for PFOA and PFOS, if and when finalized, would provide EPA with powerful new tools to clean up existing contamination in hot spots across the country, while seeking to hold those responsible for the releases financially accountable. The designation would also increase EPA’s reporting and information gathering authorities as the agency continues to build its database of PFAS contamination.
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Continue Reading First Major CERCLA Move for PFAS

The U.S. Environmental Protection Agency (EPA) this week added five PFAS chemicals for a total of six PFAS chemicals to a list of risk-based values. EPA uses these values to determine if response or remediation activities are needed. The five PFAS additions include: hexafluoropropylene oxide dimer acid and its ammonium salt (HFPO-DA — sometimes referred to as GenX chemicals), perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA), and perfluorohexanesulfonic acid (PFHxS). EPA added the first PFAS substance, perfluorobutanesulfonic acid (PFBS), to the Regional Screening Level (RSL) and Regional Removal Management Level (RML) lists in 2014 and updated it in 2021 when EPA released its updated toxicity assessment for PFBS.
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Continue Reading EPA Sets Screening Levels for Five PFAS Compounds

Gearing up for a potential final rule in summer 2023, the U.S. Environmental Protection Agency (EPA) on January 10 submitted a proposed rule to the White House Office of Management and Budget (OMB) to designate perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) as hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). OMB reviews are generally targeted to be completed within 90 days, but they can last much longer — or be concluded more quickly — depending on the rule being studied. The submittal is consistent with what EPA forecasted in its October 2021 PFAS Roadmap and its Unified Agenda.
Continue Reading EPA’s Delivery of Draft Rule to OMB for Study Starts the Clock for Potential PFAS Reporting and Enforcement Activity by 2023

Today, the U.S. Environmental Protection Agency (EPA) announced a new “Strategic Roadmap (Roadmap),” describing a suite of ongoing and future agency actions to address per- and polyfluoroalkyl substances (PFAS). While many of these actions were previously presented in EPA’s 2019 PFAS Action Plan, or in more recent announcements, the Roadmap provides additional updates and clarity into the expected timing of some regulatory actions. The new projected dates for some key regulatory initiatives include the following:
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Continue Reading EPA Announces New “Strategic Roadmap” for PFAS

On March 26, the California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) gave notice of its selection of several per- and polyfluoroalkyl substances (PFAS) for review and possible listing under California’s Proposition 65 (Prop 65). OEHHA published two separate notices for public comment: one notice for perfluorooctane sulfonate (PFOS) and its salts and transformation and degradation precursors, and another notice for perfluorodecanoic acid (PFDA), perfluorohexanesulfonic acid (PFHxS), perfluorononanoic acid (PFNA), and perfluoroundecanoic acid (PFUnDA), as well as each of their salts. The public comment period for both notices closes on May 10, 2021.
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Continue Reading California Selects Several PFAS Substances for Scientific Review and Possible Prop 65 Listing