Regulation & law · 11/06/2026Updated: 10/16/2026 · 1 min read

EPA Corrects California's Air Quality Standards, Denies Extension Request

Summary

The Environmental Protection Agency (EPA) has finalized a decision that the San Joaquin Valley in California failed to meet the 2006 24-hour fine particulate matter (PM 2.5) national ambient air quality standards, requiring the state to revise its air quality plan.

Original source language: Federal Register — All DocumentsOpen original release →

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