Energy & environment · 23/03/2026Updated: 10/16/2026 · 1 min read
Determination of Attainment by the Attainment Date But for International Emissions for the 2015 Ozone National Ambient Air Quality Standards; Phoenix-Mesa Nonattainment Area, Arizona
The Environmental Protection Agency (EPA) determined that the Phoenix-Mesa area would have attained the 2015 ozone NAAQS by August 3, 2024, but for international emissions, thus avoiding Clean Air Act requirements.