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As previously reported in The Climate Report, the states of Texas and Wyoming, along with industry groups, challenged in the U.S. Court of Appeals for the District of Columbia U.S. EPA's plan for implementing greenhouse gas emissions regulations (State of Texas v. the United States Environmental Protection Agency, No. 10-1425).

EPA’s March 21, 2011 National Emission Standards for Hazardous Air Pollutants for Area Sources: Industrial, Commercial, and Institutional Boilers (commonly referred to as the Minor HAP Source Boiler GACT rule) requires owners/operators of affected boilers to conduct tune-ups by March 21, 2012.

I have never understood why 43 states – including the great Commonwealth of Massachusetts – have independent elected attorneys general.

On Monday, the Third Circuit Court of Appeals affirmed EPA's TMDL for the Chesapeake Bay.

On January 30, 2013, EPA published amendments to its regulations at 40 C.F.R. Part 63, Subpart ZZZZ regulating emissions of hazardous air pollutants from reciprocating internal combustion engines.

In August, EPA announced a Consent Order with ChemArt Company of Lincoln, Rhode Island to correct alleged violations of EPA's Risk Management Program (RMP) under the Clean Air Act.

In response to a petition filed by the Sierra Club, the Environmental Protection Agency (EPA) issued a final rule on May 22, 2015 requiring 36 states to revise their State Implementation Plans (SIPs)...

The Environmental Protection Agency ("EPA") announced a proposed rule to amend the new chemicals procedural regulations under TSCA. This proposal follows the 2016...

On August 3, EPA released its final rule implementing the Climate Action Plan focused on reduction of greenhouse gas emissions – carbon dioxide or CO2, from power plants.

EPA posted its final implementation rule for the 2015 ozone standard on its website November 8, 2018, the day after it was signed by Andrew Wheeler.

For some time, EPA has been working on an update to its facility safety rule under Section 112(r) of the Clean Air Act. The existing rule requires companies to prepare a plan to submit to EPA...

On Friday, EPA finally issued its long-awaited revised risk assessment for tetrachloroethylene, also known as perc or PCE.

March 31, 2011 is the deadline for the first annual reports due under the Mandatory Reporting for Greenhouse Gas Emissions Rule (Mandatory Reporting Rule or the Rule) that the U.S. Environmental Protection Agency (EPA) published in the October 30, 2009 Federal Register.

On December 8, 2025, the Minnesota Pollution Control Agency (MPCA) finalized its PFAS-in-Products program rules in response to an Administrative Law Judge order requiring the Agency to reduce fees, among other changes.

The incoming chair of the Senate Energy and Natural Resources Committee sent a letter on January 10 to the Energy Secretary, advising the agency to not grant export licenses for liquefied gas until the shortcomings of an agency-sponsored study are corrected.

I have previously noted that standing is a double-edged sword. Most commonly, the regulated community uses standing to keep citizen plaintiffs out of court.

On Nov. 16, 2021, the Minnesota Pollution Control Agency (MPCA) released a Draft PFAS Monitoring Plan.