2012 State Implementation Plan (SIP) Emission Inventory Submittal for the 2008 Federal 8-Hour Ozone Standard
This page last reviewed July
In 2008, the United States Environmental Protection Agency (U.S. EPA) strengthened the ambient air quality standard for 8-hour ozone from 0.08 to 0.075 parts per million (ppm). Effective July 20, 2012, U.S. EPA completed area designations for the 2008 8-hour ozone standard with sixteen areas in California classified as marginal, serious, severe, or extreme nonattainment. The Act requires states and local governments to prepare baseline emission inventories for all areas exceeding the National Ambient Air Quality Standards within two years of designation.
2012 Baseline Emission Inventory
The Emission Inventory SIP Submittal has been compiled by Air Resources Board (ARB) staff and reflects the most up-to-date emission inventory for all non-attainment areas. Since the Statewide attainment challenges for the national 8-hour standard occur in the summer months, the 2012 baseline summer season (May-October) planning emission inventories (tons/day) for nitrogen oxides (NOx) and volatile organic compounds (VOCs), the two precursors to ozone formation, have been compiled for the sixteen areas.
This SIP Submittal was approved by the ARB Board on June 26, 2014 and transmitted to U.S. EPA on July 17, 2014.
- Transmittal Letter to U.S. EPA (pdf - 911 kb)
- ARB Board Resolution 14-14 (pdf - 240 kb)
- Public Notice of Board Hearing (pdf - 679 kb)
- ARB Staff Report (pdf - 662 kb)