Clean Data Determination; 1997 8-Hour Ozone Standards; California; Sacramento Metro Area
The comment period closed Oct 14, 2026.
The U.S. Environmental Protection Agency (EPA or "Agency") is proposing to issue a clean data determination (CDD) for the Sacramento Metro, California nonattainment area to reflect our finding that the area is attaining the 1997 8-hour ozone national ambient air quality standards (NAAQS or "standards"). This finding is based on quality-assured and certified ambient air quality monitoring data from
Summary from the Federal Register.
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Full history
- Sep 14, 2026
Rule published
Clean Data Determination; 1997 8-Hour Ozone Standards; California; Sacramento Metro Area
Environmental Protection Agency
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From the Federal Register. This record was last updated Oct 12, 2026. About our data
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