The South Coast Air Basin (Basin) is a Serious nonattainment area for the 2006 24-hour PM2.5 standard, with an attainment date of December 31, 2019. Based on ambient monitoring data from 2017-2019, the Basin did not attain the standard by the deadline. A revision to the State Implementation Plan is developed to address the new planning requirements.

• Notice of Regional Public Hearing - August 21, 2020 (PDF, 110 kb)
• Notice of Availability of Document and Virtual Meeting Information - September 18, 2020 (PDF, 260 kb)
• Draft Attainment Plan for 2006 24-Hour PM2.5 Standard  - September 18, 2020 (PDF, 7 mb)
• Agenda  - October 1, 2020 (PDF, 336 kb)
• Fact Sheet - October 1, 2020 (PDF, 150 kb)
• Presentation - October 1, 2020 (PDF, 1 mb)
• Printer Friendly Presentation  - October 1, 2020 (PDF, 1 mb)
• Notice of Public Hearing - October 30, 2020 (PDF, 120 kb)
• Draft Final Attainment Plan for 2006 24-Hour PM2.5 Standard - November 3, 2020 (PDF 8 mb)
• Final Attainment Plan for 2006 24-Hour PM2.5 Standard - December 8, 2020 (PDF, 9 mb)