EPA Redesignates Yuma as Ozone-Compliant Clean Air Zone
Published Date: 11/18/2025
Rule
Summary
The EPA is officially giving a thumbs-up to Arizona’s plan that shows Yuma’s air is cleaner and meets ozone pollution standards from 2015. This means Yuma moves from a ‘problem area’ to a ‘good air zone,’ with rules to keep the air fresh through 2037. The change kicks in December 18, 2025, helping local drivers and communities breathe easier without extra costs.
Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
Yuma Redesignated to Attainment
If you live or operate in the Yuma area, the EPA officially redesignated the area to attainment for the 2015 ozone standard effective December 18, 2025. The redesignation does not create new regulatory requirements and results in the applicability of the less stringent Clean Air Act requirements that apply to attainment areas.
Maintenance Plan Secures 10-Year Ozone Protection
The EPA approved Arizona’s Yuma Maintenance Plan showing the Yuma area will maintain the 2015 ozone national ambient air quality standard for 10 years beyond redesignation. That maintenance commitment is tied to the redesignation that is effective on December 18, 2025.
Vehicle Emissions Budgets Approved (2020,2030,2037)
The EPA approved motor vehicle emissions budgets for volatile organic compounds (VOC) and nitrogen oxides (NOX) for the years 2020, 2030, and 2037 for use in transportation conformity in the Yuma area. The rule notes these budgets apply for transportation conformity purposes and that the action may have Tribal implications because the Yuma area includes some Tribal roads serving the Cocopah and Quechan Tribes.
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