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Part D SIPs, §§171-193

WildEarth Guardians v. McCarthy

A district court dismissed an environmental group's CAA citizens suit against EPA for failing to make a finding that Idaho and Utah failed to timely submit SIPs for fine particulate matter (PM2.5). In 2007, EPA issued a rule that...

Sierra Club v. EPA

The court holds that the U.S. Environmental Protection Agency's (EPA's) approval of Georgia's state implementation plan (SIP) mooted environmental groups' claims that Atlanta's motor vehicle emissions budget (MVEB) was not adequate for...

Citizens for Pa.'s Future v. Mallory

The court grants an environmental group's motion for partial summary judgment against Pennsylvania officials for failing to implement the state-enhanced vehicle inspection and maintenance (I/M) program in 16 counties by November 15,...

Sierra Club v. Whitman

The court recommends that the U.S. Environmental Protection Agency (EPA) be ordered to publish formal Clean Air Act (CAA) ozone attainment determinations for the Birmingham, Alabama, area and the Kent and Queen Annes counties area in...

Michigan v. EPA

The court largely upholds a U.S. Environmental Protection Agency (EPA) rule mandating that 22 states and the District of Columbia revise their state implementation plans (SIPs) to mitigate ozone transport by reducing nitrogen oxides (NO...

Association of Int'l Auto. Mfrs., Inc. v. Commissioner

The court grants automakers' motion to stay their challenge to Massachusetts' zero emission vehicle standards pending the automakers' appeal of a U.S. Environmental Protection Agency (EPA) ruling in the Court of Appeals for the D.C....

Environmental Defense Fund v. EPA

The court holds unlawful U.S. Environmental Protection Agency (EPA) regulations that allow both local approval and federal funding of transportation projects that fail to satisfy the Clean Air Act's (CAA's) state implementation plan (...

Los Angeles, City of v. Federal Aviation Admin.

The court holds that the Federal Aviation Administration's (FAA's) approval of the expansion of Burbank-Glendale-Pasadena Airport does not violate the National Environmental Policy Act (NEPA) or the Clean Air Act (CAA). The court first...

New York v. EPA

The court denies a petition challenging the U.S. Environmental Protection Agency's (EPA's) decision to grant a nitrogen oxide (NOx) reduction requirement exemption to four states abutting Lake Michigan under...

American Auto. Mfrs. Ass'n v. Commissioner

The court holds that the Massachusetts Department of Environmental Protection's (DEP's) zero emission vehicle (ZEV) regulations for automobile manufacturers are not identical to California standards as required by Clean Air Act (CAA) §...