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The Environmental Protection Agency has finalized a decision that splits its approval of Hawaii’s air quality plan for the second implementation period. The agency approved most of the state’s submission, which addresses regional haze in compliance with federal clean air standards. However, it disapproved specific elements related to the long-term strategy for closing certain power generation units.

Why it matters: This ruling clarifies the legal limits of state air quality plans when they intersect with property rights and utility operations. It means Hawaii must revise its strategy for reducing haze from these power plants in a way that respects existing contracts and constitutional protections, rather than relying on mandatory shutdowns.

Who it affects

  • The Hawaii Department of Health and other state regulators responsible for updating the State Implementation Plan

This action was issued by the Environmental Protection Agency as a final rule published in the Federal Register; readers should consult the full document for detailed legal citations.

Agency: Environmental Protection Agency
Source: Federal Register — read the official document

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