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Nov. 24, 2025

Environmental groups challenge EPA for failing to act on ozone pollution

Advocates claim the EPA's delays on state air quality plans have allowed dangerous ozone pollution to persist in the West Mojave Desert and Denver region. Their suit seeks court-enforced action after years of inaction.

Environmental groups challenge EPA for failing to act on ozone pollution
Environmental Protection Agency Administrator Lee Zeldin. Photo: Shutterstock

Two environmental groups sued Environmental Protection Agency Administrator Lee Zeldin, alleging he unlawfully missed multiple Clean Air Act deadlines to address ozone pollution in California and Colorado, worsening smog exposure for millions. The lawsuit, filed in federal court in California, seeks court-ordered deadlines requiring the EPA to act on overdue state implementation plans and issue federal plans where states fall short.

The complaint argues the EPA has blown past stat...

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