2018 Updates: In response to court decisions, some elements included in the 2016 AQMP required updates. CARB staff prepared the 2018 Updates to the California State Implementation Plan (2018 SIP Update) to update SIP elements for nonattainment areas throughout the State as needed. CARB adopted the 2018 SIP Update on October 25. 2018.
2018 Revision to the 1-hour Ozone SIP: The 1-hour Ozone SIP Revision demonstrates that the new technology provisions allowed by Section 182(e)(5) of the Clean Air Act (Act) are no longer needed. CARB will consider adoption of the 2018 Revision to the 1-hour Ozone SIP on December 13, 2018.