EPA OKs California Smog Reduction Targets
Published Date: 9/14/2026
Rule
Summary
The EPA just gave a thumbs-up to California’s updated pollution limits for cars in the San Joaquin Valley, aiming to cut smog-causing chemicals like nitrogen oxides and VOCs by 2026, 2029, and 2031. This change affects everyone in the area by using the latest science to keep the air cleaner and healthier. The new rules kick in on October 14, 2026, helping the region breathe easier without extra costs.
Analyzed Economic Effects
2 provisions identified: 0 benefits, 1 costs, 1 mixed.
Updated SJV NOX and VOC Budgets
The EPA approved revised motor vehicle emissions budgets for nitrogen oxides (NOX) and volatile organic compounds (VOC) for the San Joaquin Valley for the 2008 8-hour ozone standard for the years 2026, 2029, and 2031, effective October 14, 2026. The rule lists county-specific budgets in tons per average summer day (for example, Fresno NOX: 8.4 (2026), 7.8 (2029), 7.6 (2031); Fresno VOC: 4.4 (2026), 3.9 (2029), 3.6 (2031); Kern NOX: 10.6, 10.3, 10.3; Kern VOC: 3.7, 3.3, 3.1).
Revised Budgets Required for Conformity
On October 14, 2026, the previously approved San Joaquin Valley budgets for the 2008 ozone standard will no longer apply for transportation conformity purposes. The San Joaquin Valley metropolitan planning organizations (MPOs) and the U.S. Department of Transportation (DOT) must use the revised 2026, 2029, and 2031 budgets in future transportation conformity determinations.
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