State Implementation Plan (SIP)

This page is updated with information about air quality regulations called State Implementation Plans (SIPs). A SIP is a collection of regulations and documents used by our state to reduce air pollution in areas that do not meet National Ambient Air Quality Standards, or NAAQS.

When a notice of public comment period is open for a specific SIP, information will be listed below:

At this time, there are no SIPs open for public comment.

State Implementation Plan Revision for Air Quality: Infrastructure Certification for the 2015 National Ambient Air Quality Standard for Ozone (Submitted as a SIP revision September 23, 2020)

Reasonably Available Control Technology State Implementation Plan Revision: 2008 and 2015 Ozone National Ambient Air Quality Standards (Submitted as SIP Revision: September 20, 2019)

For EPA-approved regulations and air quality plan summaries visit:

epa.gov/air-quality-implementation-plans/approved-air-quality-implementation-plans-region-1