EPA Approves Colorado's Plan to Reduce Smog in Denver Area
Official: Air Plan Approval; Colorado; Serious Attainment Plan Contingency Measures and RACT Requirements for the 2008 8-Hour Ozone National Ambient Air Quality Standards for the Denver Metro/North Front Range Nonattainment Area
Reading: EPA approval of Colorado's existing Clean Air Act SIP submittals for contingency measures and RACT requirements, without substantive changes to the underlying air quality standards or stringency.
This approval means Colorado can move forward with these pollution-reduction measures, though the EPA is still reviewing a couple of specific requirements.
In clear language
The EPA has approved Colorado's plan to reduce dangerous ozone (smog) pollution in the Denver area by requiring cleaner technology at factories and businesses. The state must implement new controls on motor vehicle coatings and other industrial processes to meet federal air quality standards. This approval means Colorado can move forward with these pollution-reduction measures, though the EPA is still reviewing a couple of specific requirements.
How does this affect you?
Pick the type of resident or organization you most identify with — we'll generate a plain-language breakdown of what changes for you and what you can do about it.
Who does this affect?
- Residents of Denver and the North Front Range area who breathe the air
- Manufacturers and businesses that apply coatings to vehicles and products
- Industrial facilities like refineries, landfills, and mills that emit pollutants
- Colorado state environmental agencies responsible for enforcing air quality rules
What can you do?
- Monitor local air quality reports during high pollution days and limit outdoor activity if needed
- Support or participate in community efforts to hold polluting industries accountable
- Stay informed about your state's air quality plans by visiting Colorado's environmental department website
Timeline
- Effective: 2026-05-11
- Effective: 2026-05-11
- Effective: 2026-05-11
- Effective: 2026-05-11
- Effective: 2026-05-11
- Effective: 2026-05-11
- Effective: 2026-05-11
- Effective: 2026-05-11
- Effective: 2026-05-11
- Effective: 2026-05-11
- 2026-04-09 (EPA published this decision)
- 2026-05-11 (Decision becomes effective)
No New Jersey official has a verified action on this policy yet.
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