Adjustments to Original PM-2.5 (2012) Nonattainment Area Baseline

Data is current as of November 30, 2025

---

CHANGE TO A HIGHER CLASSIFICATION (BUMP-UPS)

November 09, 2020, Effective December 09, 2020 ( 85 FR 71264 )

Los Angeles-South Coast Air Basin, CA - CALIFORNIA

Reclassify from Moderate to Serious