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Approval and revision, §110(a)

Sierra Club v. United States Environmental Protection Agency

The Fifth Circuit upheld EPA's approval of Louisiana's SIP for controlling regional haze. Environmental groups challenged the approval of Louisiana's selection of low-sulfur coal over a more effective pollutant control as the best...

New York v. Environmental Protection Agency

The D.C. Circuit vacated EPA's 2018 update to the Cross-State Air Pollution Rule (CSAPR). States and environmental groups argued that EPA violated the CAA by failing to require upwind states to reduce their contribution of ozone...

Wisconsin v. Environmental Protection Agency

The D.C. Circuit granted in part and denied in part a petition challenging EPA's update to the Cross-State Air Pollution Rule. Environmental groups and Delaware argued that EPA violated the CAA by failing to require upwind states to...

Montana Environmental Information Center v. Thomas

The Ninth Circuit denied an environmental group's petition to review EPA's approval of a Montana SIP revision. The group argued that the approval was arbitrary and capricious because Montana's Department of Environmental Quality...

Utah Physicians for a Healthy Environment v. Kennecott Utah Copper LLC

A district court dismissed on summary judgment environmental groups' lawsuit against a mining company for alleged SIP violations as it relates to NAAQS for coarse particular matter (PM10). Under the Utah SIP's "material moved" provision...

Arizona v. U.S. Environmental Protection Agency

The Ninth Circuit held that EPA did not act arbitrarily and capriciously when it disapproved in part Arizona's regional haze SIP and issued a replacement federal implementation plan (FIP) in place of the disapproved SIP elements. First...

National Parks Conservation Ass'n v. United States Environmental Protection Agency

The Third Circuit vacated and remanded EPA's approval of Pennsylvania's 2014 regional haze SIP. CAA §169A requires states to evaluate the impact that emissions from certain sources of pollution within their borders have on atmospheric...

Indiana v. Environmental Protection Agency

The Seventh Circuit upheld EPA's approval of revisions to Illinois' SIP, thereby rejecting challenges raised by Indiana. Indiana argued that the relaxation of Illinois' vehicle emissions testing program will decrease the likelihood that...

Association of Irritated Residents v. U.S. Environmental Protection Agency

The Ninth Circuit denied petitions for review challenging EPA's promulgation of 40 C.F.R. §52.245, a regulation that revised the scope of a previous EPA decision, after the Agency determined that it had mistakenly approved certain new...

Medical Advocates for Healthy Air v. U.S. Environmental Protection Agency

The Ninth Circuit denied a petition for review challenging EPA's approval of a revision to California's SIP that authorized the San Joaquin Valley air pollution control district to impose fees on mobile sources of pollution—primarily...