Your Guide to Emerging Issues in Environmental Regulation and Litigation.
On April 6, 2026, the U.S. Environmental Protection Agency (EPA) published in the Federal Register its draft Sixth Contaminant Candidate List (CCL), which lists contaminants currently not subject to any national primary drinking water regulations. These contaminants are either presently known or in the future will appear in public water systems and may be subject …
The Mercury and Air Toxics Standards (MATS) are federal air pollution regulations issued by the U.S. Environmental Protection Agency (EPA) under the Clean Air Act. Finalized in 2012 and effective beginning in 2015, MATS establish technology‑based emission limits for hazardous air pollutants (HAPs) emitted by coal‑ and oil‑fired power plants. In 2024, the EPA finalized …
The Environmental Protection Agency recently issued a press release on its efforts over the last year regarding PFAS contamination, noting it “represents just the beginning of the Trump Administration’s fight against the risks of PFAS contamination.” Some of the work the agency highlighted included “better testing and detection, direct community support, enforcement, clear public education, commonsense …
In a February 5, 2026 filing before the D.C. Circuit, a coalition of industry groups strongly endorsed the U.S. Environmental Protection Agency’s method for determining when upgrades at industrial facilities must undergo federal air‑quality review. The dispute centers on the EPA’s “Project Emissions Accounting” (PEA) approach under the Clean Air Act’s New Source Review (NSR) …
The Environmental Protection Agency has taken measures to roll back the “good neighbor” rule, which limits smokestack emissions affecting downwind areas in neighboring states under the Clean Air Act (CAA). The rule is intended to address transboundary ozone pollution that can exacerbate health hazards by requiring each state to implement regulations meant to reduce emissions …
On January 13, 2026, the U.S. Environmental Protection Agency announced a proposed rule to update procedural provisions of Section 401 of the Clean Water Act (CWA), which governs the water quality certification process for federally licensed or permitted projects. Section 401 of the Clean Water Act requires that before a federal agency can issue a …
Earlier this month, Seattle U.S. District Court Judge Tiffany M. Cartwright denied a motion for a preliminary injunction that sought to block the U.S. Environmental Protection Agency from cutting solar power grant programs during the pendency of the litigation challenging the EPA’s termination of the Solar for All Program. Back in October 2025, 23 states and …
The U.S. Environmental Protection Agency announced Jan. 5 the process it will be using to notify manufacturers and users of certain toxic substances about imminently expiring confidential business information claims (CBI) under the Toxic Substances Control Act (TSCA). Companies request CBI claims as to proprietary information or knowledge – such as manufacturing processes and chemical formulas …
The Environmental Protection Agency announced Nov. 25 that $3 billion in funding would be made available for states through the State Revolving Fund (SRF) geared towards programs to reduce lead exposure in drinking water. The goal is to fund programs that will find and remove lead service lines that deliver drinking water to communities. As …
The U.S. Environmental Protection Agency on Nov. 10 released a proposal aimed at improving the scope of its perfluoroalkyl and polyfluoroalkyl substances (PFAS) reporting requirements under the Toxic Substances Control Act (TSCA). The initial regulation was finalized toward the end of 2023. However, both the Biden and Trump administrations pushed back the initial compliance deadlines …