Center for Biological Diversity
EPARulemakingEPA-R08-OAR-2024-0225

Air Plan Approval and Conditional Approval; Colorado; Revisions to Regulation Numbers 7 and 21 and RACT Requirements for the 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area

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Jun 23, 2026
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Center for Biological Diversity filings
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Center for Biological Diversity filed 1 comment on this docket between Sep 6, 2024 and Sep 6, 2024. 0 other organizations filed here. The comment window closed 5d ago.

What Center for Biological Diversity filed (1)

Sep 6, 2024· Comment submitted by Center for Biological Diversity· EPA-R08-OAR-2024-0225-0013

Please see the attached comment and exhibits, submitted on behalf of the Center for Biological Diversity, Public Employees for Environmental Responsibility, Earthjustice, Earthworks, Environmental Integrity Project, and Sierra Club.

Abstract

The Environmental Protection Agency (EPA) is proposing to approve and conditionally approve portions of a State Implementation Plan (SIP) submission from the State of Colorado dated May 3, 2024. The submission relates to Colorado Air Quality Control Commission (AQCC or Commission) Regulation Number 7 (Reg. 7) and Regulation Number 21 (Reg. 21), and addresses Colorado SIP obligations related to reasonably available control technology (RACT) requirements for sources in nonattainment areas for the 2008 ozone National Ambient Air Quality Standards (NAAQS). The EPA is taking this action pursuant to the Clean Air Act (CAA).

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