Air Plan Approval; Arkansas; Regional Haze State Implementation Plan for the Second Implementation Period
What happened
The U.S. Environmental Protection Agency (EPA) finalized approval of Arkansas' State Implementation Plan (SIP) revision, submitted by the Division of Environmental Quality (DEQ) on August 8, 2022, clarified July 29, 2025, and supplemented May 4, 2026. This action, signed by Donald Trump, satisfies requirements for protecting visibility in Class I Federal areas for the second implementation period. The EPA also affirmed a new policy for evaluating reasonable progress towards visibility goals.
Why it matters
This approval ensures Arkansas' long-term strategy for reducing man-made visibility impairment in protected natural areas is in effect. It also establishes a new EPA policy for how states' progress in improving air quality and visibility will be evaluated, affecting future planning periods.
Who it affects
- ›State of Arkansas and its environmental agencies
- ›U.S. Environmental Protection Agency (EPA)
- ›Mandatory Class I Federal areas (national parks, wilderness)
- ›People living near or visiting Class I areas
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