EPA Approval of Missouri's Plan to Reduce Ozone Pollution in the St. Louis Area
Official: Air Plan Approval; Missouri; Moderate Attainment Plan Elements for the 2015 8-Hour Ozone Standard for the Missouri Portion of the St. Louis Nonattainment Area
Reading: The EPA is approving an existing state implementation plan framework for ozone attainment without introducing new or stricter requirements beyond what the Clean Air Act already mandates for Moderate nonattainment areas.
Louis region.
In clear language
The EPA is approving Missouri's plan to reduce ground-level ozone pollution in the St. Louis area to meet federal air quality standards. The plan includes vehicle inspection and maintenance programs, rules for new pollution sources, and requirements for major factories to use cleaner technology. This approval applies to the Missouri side of the bi-state St. Louis region.
How does this affect you?
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Who does this affect?
- Residents in the Missouri portion of the St. Louis metropolitan area who breathe the air and may have health issues from ozone pollution
- Vehicle owners in Missouri who will need to comply with vehicle inspection and maintenance programs
- Factories and large industrial facilities in the region that emit volatile organic compounds or nitrogen oxides
- Businesses planning to build or expand operations in the nonattainment area, which will face stricter permitting requirements
What can you do?
- Keep your vehicle well-maintained and pass required emissions inspections to reduce pollution from cars and trucks
- Check the EPA or Missouri Department of Natural Resources website for air quality alerts and limit outdoor activities on high ozone days
- Support local policies that encourage electric vehicles, public transit, and reduced vehicle emissions in your community
Timeline
- September 6, 2023 (Missouri submitted its state implementation plan revision)
- August 14, 2026 (EPA published this proposed approval)
No New Jersey official has a verified action on this policy yet.
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