5 Sep 2025
🌍Business Implications of California's Carbon Monoxide SIP Revision
Air Plan Approval; California; State Implementation Plan Revision for Chico, Modesto and Stockton Carbon Monoxide Maintenance Areas
Summary
The Environmental Protection Agency (EPA) is taking final action to approve a revision to the California state implementation plan (SIP) that removes carbon monoxide (CO) contingency measures and monitoring requirements from the maintenance plan for three CO maintenance areas: Chico Urbanized Area, Modesto Urbanized Area, and Stockton Urbanized Area. We are approving the revision under the Clean Air Act (CAA or "Act").
Agencies
- Environmental Protection Agency
Business Impact
$$ - Med
The EPA's approval of changes to California's State Implementation Plan (SIP) impacts regulatory compliance for businesses in the Chico, Modesto, and Stockton areas. Notably, removing carbon monoxide contingency measures and monitoring requires affected businesses to adjust their compliance strategies accordingly.