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EPA’s Integrated Risk Information System (IRIS) program released a draft toxicological review of perfluorohexanoic acid (PFHxA) today, signaling another step in the agency’s ongoing research and regulatory initiatives focused on per- and polyfluoroalkyl substances (PFAS). This particular PFAS will be interesting to monitor because it is a breakdown product of other PFAS that may enter

The Environmental Protection Agency (EPA) and the U.S. Army Corps of Engineers (the “Corps”) (together the “Agencies”) have continued working on a proposed rule to revise the definition of “waters of the United States” (WOTUS) under the Clean Water Act (CWA or Act), which will soon move to the next stage of agency consideration.[1]

On January 27, 2022, the Pipeline and Hazardous Materials Safety Administration (PHMSA) announced a public informational meeting on February 17, 2022 regarding PHMSA’s plan for forthcoming audits of updated inspection and maintenance plans to eliminate and minimize leaks pursuant to Section 114 of the Protecting Our Infrastructure of Pipelines and Enhancing Safety (PIPES) Act of

On January 11, the U.S. Environmental Protection Agency (EPA) issued a new interpretation of its coal combustion residual (CCR) regulations: CCR landfills or surface impoundments “cannot be closed with coal ash in contact with groundwater.” Although EPA claims it has “consistently held” this interpretation, this is the first time EPA has expressly articulated this view.

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).

On October 21, the U.S. District Court for the Northern District of California vacated and remanded the U.S. Environmental Protection Agency’s (EPA) 2020 Clean Water Act Section 401 final rule (Certification Rule).

In response to the court’s ruling, EPA is implementing the previous water quality certification rule nationwide, which had been in effect since 1971,