Comment – EPA proposal re: Phoenix Mesa NAA 2015 ozone NAAQS
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PEER | December 19, 2025
Comments on the EPA proposal to determine that the Phoenix-Mesa ozone NAA would have attained the 2015 ozone NAAQS by its August 3, 2024, but for emissions emanating from outside the United States ...
Comment – Colorado Air Plan Approval
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PEER | June 24, 2025
Comments re: Air Plan Approval; Colorado; Serious Attainment Plan Contingency Measures for the 2008 8-Hour Ozone National Ambient Air Quality Standards for the Denver Metro/North Front Range Nonattainment Area ...
Letter to Governor Polis – Colorado’s Clean Air Tools
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PEER | October 15, 2024
Letter to Colorado Governor Jared Polis regarding Colorado’s Clean Air Tools to Reduce Front Range Smog ...
EPA Rejects Air-Pollution Permits for Oil, Gas Wells in Colorado
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Susan Sargent | February 1, 2024
Win for Clean Air Calls Into Question Effectiveness of Pollution Controls ...
Colorado’s Air Pollution Program Broken and Adrift
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Susan Sargent | November 8, 2023
State’s Air Quality Worsens While Cosmetic Changes Ignore Core Problems ...
