Regulation & law · 30/10/2025Updated: 10/16/2026 · 1 min read

EPA Determines Mariposa County Attained 2015 Ozone NAAQS by August 3, 2024

Summary

The Environmental Protection Agency (EPA) has finalized a determination that the Mariposa County nonattainment area in California met the 2015 ozone national ambient air quality standards (NAAQS) by its August 3, 2024 attainment date, based on quality-assured monitoring data from 2021-2023.

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

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