Środowisko i energia · 04/03/2026
Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards
The Environmental Protection Agency (EPA) is proposing to approve revisions to Arizona's state implementation plan for attaining sulfur dioxide national ambient air quality standards in the Hayden SO2 nonattainment area.