Proposed rule · 2025-13957

Air Plan Approval; Washington; Regional Haze State Implementation Plan for the Second Implementation Period

The Environmental Protection Agency (EPA) is proposing to approve the regional haze State Implementation Plan (SIP) revision submitted by Washington on January 28, 2022, to address applicable requirements under the Clean Air Act (CAA) and the EPA's Regional Haze Rule (RHR) for the regional haze program's second implementation period. The EPA is proposing this action pursuant to the CAA.