Final rule · 2025-18599

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

The Environmental Protection Agency (EPA) is approving 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.