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Clean Air Act (CAA)

Sierra Club v. Environmental Protection Agency

The D.C. Circuit dismissed a petition to review EPA's order denying an environmental group's objection to renewal of a Title V operating permit for a power plant in Utah. The group objected that the renewal permit incorporated...

Sierra Club v. Environmental Protection Agency

The D.C. Circuit dismissed in part and denied in part a petition to review EPA's 2016 revisions to its ambient air quality monitoring system regulations. An environmental group argued that the revisions violated the CAA by not requiring...

California v. United States Environmental Protection Agency

A district court granted in part summary judgment against EPA for failure to implement its 2016 Emission Guidelines and Compliance Times for Municipal Solid Waste Landfills. Eight states argued that the Agency failed to implement and...

New York v. Environmental Protection Agency

The D.C. Circuit denied downwind states' petition challenging EPA's refusal to expand the Northeast Ozone Transport Region, which consists of states required by the Agency to enact tight restrictions on pollutants that contribute to...

Mexichem Fluor, Inc. v. Environmental Protection Agency

The D.C. Circuit granted hydrofluorocarbon (HFC) manufacturers' petitions to review a 2016 EPA rule that rendered certain HFCs unacceptable for various uses in aerosols, motor vehicle air conditioners, commercial refrigerators, and...

Protecting Air for Waterville v. Ohio Environmental Protection Agency

The Sixth Circuit dismissed environmental groups' petition to review air pollution control permits issued by Ohio's Environmental Protection Agency for two natural gas compressor stations along a natural gas pipeline that runs from Ohio...

Air Alliance Houston v. U.S. Chemical and Safety Hazard Investigation Board

A district court granted environmental groups' request to compel the U.S. Chemical and Safety Hazard Investigation Board to promulgate regulations concerning accidental chemical releases. The groups argued that the Board's failure to...

National Parks Conservation Ass'n v. North Dakota Department of Health

A state court upheld the North Dakota Department of Health's decision to issue an air quality permit for construction of an oil refinery less than three miles from Theodore Roosevelt National Park. Environmental groups argued that the...

California v. United States Environmental Protection Agency

A district court denied EPA's motion to dismiss a lawsuit brought by several states alleging that the Agency failed to implement and enforce its 2016 Emission Guidelines and Compliance Times for Municipal Solid Waste Landfills. The...

Masias v. Environmental Protection Agency

The D.C. Circuit denied two petitions to review EPA attainment designations for the 2010 sulfur dioxide NAAQS. An environmental group argued that the Agency should have designated Gallia County, Ohio, as a nonattainment area rather than...

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