Jump to Navigation
Jump to Content

National ambient air quality standards (NAAQS), §109

Sierra Club v. United States Environmental Protection Agency

The Third Circuit granted a petition to review EPA's approval of Pennsylvania's proposed NAAQS for ozone. An environmental group argued the standards wrongly claimed to reduce pollution output at the state's most advanced coal-burning...

Clean Wisconsin v. Environmental Protection Agency

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...

Ass'n of Irritated Residents v. United States Environmental Protection Agency

A district court granted in part an environmental group's motion for summary judgment to compel EPA to act on its 2016 Plan for the 2008 eight-hour ozone NAAQS adopted by the San Joaquin Valley Air Pollution Control District and granted...

New York v. Pruitt

A district court ordered EPA to issue federal implementation plans fully resolving interstate transport obligations under the CAA's "good neighbor" provision for the 2008 ozone NAAQS. EPA conceded that it missed the deadline to do so...

South Coast Air Quality Management District v. EPA

The D.C. Circuit held that EPA unlawfully revoked the 1997 ozone NAAQS when it implemented the 2008 standard. In 2008, EPA set the ozone NAAQS at 75 parts per billion (ppb). In 2015, when implementing the standard, the Agency eliminated...

WildEarth Guardians v. Environmental Protection Agency

The D.C. Circuit upheld EPA's compliance deadlines for states to meet the NAAQS for fine particulate matter (PM2.5). The court previously had ruled that the framework EPA had been applying to PM2.5 was incorrect, and ordered the Agency...

Sierra Club v. United States Environmental Protection Agency

A district court ordered EPA to impose a "good neighbor” federal implementation plan (FIP) for Texas with respect to the 1997 fine particulate matter (PM2.5) NAAQS. In 2015, the D.C. Circuit...

Environmental Integrity Project v. United States Environmental Protection Agency

A district court dismissed environmental groups' CAA citizen suit against EPA for failing to respond to their 2011 petition concerning ammonia gas pollution. In 2011, the groups petitioned EPA asking it to find that ammonia gas...

EME Homer City Generation, L.P. v. Environmental Protection Agency

The D.C. Circuit, on remand from the U.S. Supreme Court, invalidated EPA's 2014 emissions budgets under the transport rule...

Mississippi Commission on Environmental Quality v. Environmental Protection Agency

The D.C. Circuit denied petitions for review of EPA decisions regarding nonattainment designations under the 2008 ozone NAAQS. Several states, counties, industrial entities, and environmental organizations petitioned the court...