The Fifth Circuit vacated and remanded a lower court decision that imposed penalties against an oil company for alleged CAA permit violations at its industrial complex in Baytown, Texas. Environmental groups filed a CAA citizen suit against the company, alleging violations that occurred thousands of...

A district court denied the U.S. government summary judgment in a lawsuit concerning California's cap-and-trade agreement with Quebec. The government argued the agreement was conflict preempted by the foreign affairs doctrine because it created an obstacle to the effectuation of the Global Climate P...

The D.C. Circuit vacated EPA's denial of New York's petition concerning cross-border pollution from nine upwind states. The state had asked EPA to find that power-generating and other facilities in the nine states were violating the CAA's "good neighbor" provision by producing emissions that contrib...

The D.C. Circuit granted in part and denied in part petitions to review EPA's attainment designations for its 2015 ozone NAAQS. Environmental groups, municipal governments, and the state of Illinois argued that the Agency failed to follow its own scientific and technical record when it decided that ...

The North Dakota Supreme Court affirmed a lower court ruling upholding the North Dakota Department of Environmental Quality's issuance of an air quality permit to construct a refinery. A conservation group argued the Department's omission of an enforceable permit limit for hazardous air pollutants (...

A district court dismissed for lack of subject matter jurisdiction a suit concerning EPA's CAA obligations to regulate pollution from coke ovens. Environmental groups argued the CAA required EPA to perform a risk assessment every time it revised its technology-based standards for a hazardous polluti...

The Tenth Circuit held that EPA erred in denying an environmental group's petition to review the renewal of a state-issued Title V operating permit for a coal-fired power plant in Utah. The group's petition argued that EPA should object to the renewal because it failed to "assure compliance" with al...

A district court permanently enjoined a California Proposition 65 warning requirement on the weedkiller glyphosate. Agribusiness groups argued the law, which requires warning labels for products containing chemicals known to California to cause cancer, as applied to glyphosate compelled speech under...

The Federal Circuit reversed a Court of Federal Claims ruling that the U.S. government was liable for flooding private properties when it raised the water level of a lake in Mississippi to prevent a nearby levee from breaching. Landowners argued that raising the water level of the lake, which subseq...

A district court ruled unconstitutional provisions of a North Carolina statute that restricted undercover investigations of facilities and farms where animal testing or processing takes place. Nonprofit groups argued that provisions of the statute violated the First Amendment because they failed the...