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Clean Air Act (CAA)

Mexichem Fluor, Inc. v. EPA

The D.C. Circuit held that EPA overstepped its authority under the CAA when it banned the use of hydrofluorocarbons (HFCs) in products. In 2015, EPA issued a rule that restricted the manufacture of products containing HFCs. EPA based...

Sierra Club v. EPA

The D.C. Circuit held that EPA must justify emissions limits set for certain hazardous air pollutants. The CAA requires EPA to set limits for seven different hazardous air pollutants (HAPs). In 2015, the Agency claimed to have...

Clean Air Council v. Pruitt

The D.C. Circuit held that EPA must continue to enforce methane emissions regulations implemented by the previous administration. In 2016, an EPA regulation required oil and gas companies to find and fix leaking methane. The measure...

Murray Energy Corp. v. EPA

The Fourth Circuit held that it does not have jurisdiction to determine whether EPA violated the CAA when the agency failed to conduct continuing evaluations of potential loss or shifts of employment before implementing regulations. In...

Arizona v. EPA

The Ninth Circuit upheld an EPA federal implementation plan (FIP) under the CAA that replaced rejected portions of the Arizona SIP concerning air quality at federal parks and forests. In 2011, Arizona submitted a SIP to EPA for approval...

Blue Ridge Envtl Defense League v. Pruitt

A district court ordered EPA to complete overdue assessments of 13 sources of hazardous air pollutants. In 2016, environmental groups sued the Agency over a failure to meet CAA requirements that the standards for air pollutants be...

Yazzie v. EPA

The Ninth Circuit rejected challenges to EPA's interpretation of the Tribal Authority Rule under the CAA in a case concerning a coal-fired power plant on Navajo land. In 2013, in response to Navajo Nation's failure to issue a Tribal...

United States v. Gibson Wine Co.

A district court denied a winery's motion to strike claims by EPA under CERCLA, the CAA, and other statutes in connection with a release of ammonia that claimed the life of one worker. In 2012, the winery experienced a 284-pound release...

Cal. Cmtys. Against Toxics v. Pruitt

A district court denied EPA’s request for a five-year extension to review hazardous emissions standards under the CAA covering 20 different industries. Plaintiffs brought suit to compel EPA to finalize emissions standards for the 20...

Sierra Club v. Pruitt

A district court granted EPA's request for an extended deadline to respond to two petitions filed by an environmental group concerning the issuance of two CAA title V operating permits. EPA issued the permits for two coal-fired power...