Approval and Promulgation of the Northern Cheyenne Tribe's Tribal Implementation Plan; Northern Cheyenne Tribe; Open Burning Permit Program and Maintenance of the National Ambient Air Quality Standards

EPA is approving a Tribal Implementation Plan (TIP) submitted by the Northern Cheyenne Tribe (Tribe) on September 25, 2017, as described in our February 26, 2021 proposal. The TIP includes ambient air quality standards and provisions for an open burning permit program, enforcement and appeals, and emergency authority.

Publication Date: 
Thursday, February 10, 2022 - 4:00am

Rescission of the Source-Specific Federal Implementation Plan for Navajo Generating Station, Navajo Nation

The Environmental Protection Agency (EPA) is taking final action to rescind the federal implementation plan (FIP) that regulates emissions from the Navajo Generating Station (NGS), a coal-fired power plant that was located on the reservation lands of the Navajo Nation near Page, Arizona. NGS permanently ceased operations on November 18, 2019, and the Clean Air Act operating permit for this facility has expired.

Publication Date: 
Wednesday, June 16, 2021 - 4:00am

Approval and Promulgation of Air Quality Implementation Plan; Mashantucket Pequot Tribal Nation

The Environmental Protection Agency (EPA) approves the Mashantucket Pequot Tribal Nation's (MPTN or the Tribe) Tribal Implementation Plan (TIP) under the Clean Air Act (CAA) to regulate air pollution within the exterior boundaries of the Tribe's reservation. The TIP is one of two CAA regulatory programs that comprise the Tribe's Clean Air Program (CAP). EPA approved the Tribe for treatment in the same manner as a State (Treatment as State or TAS) for purposes of administering New Source Review (NSR) and Title V operating permits under the CAA on July 10, 2008.

Publication Date: 
Wednesday, March 3, 2021 - 4:00am