Imperial County Air Quality Management Plans

This page last reviewed December 10, 2018

This page contains information regarding recent and historical SIP activity related to the Imperial County Air Pollution Control District. Below you will find links to the 2018 PM10 SIP, the 2018 Annual PM2.5 SIP, the 2017 8-Hour Ozone SIP, 2013 24-Hour PM2.5 SIP, the 2009 1997 8-hour Ozone RACT SIP, the 2009 PM10 SIP, the 2008 Ozone Early Progress Plans, and related documents.  

Previous SIP submittals are available in hardcopy from the 
Imperial County Air Pollution Control District at (442) 265-1800.


2018 Imperial County PM10 State Implementation Plan

At a public meeting to be held on December 13, 2018, the California Air Resources Board will consider the approval of the Imperial County 2018 Redesignation Request and Maintenance Plan for Particulate Matter Less Than 10 Microns in Diameter. The information on this page provides links to CARB and District documentation.

CARB Documents       
  • Public Notice to consider the approval of the Imperial County 2018 PM10 State Implementation Plan (English) 
  • Aviso de Audiencia Publica para Tratar el Plan de Implementacion Estatal del estandar PM10 en el Condado de Imperial
  • Staff Report: Analysis of the Imperial County PM10 Nonattainment Area Redesignation Request and Maintenance Plan

District Documents

2018 State Implementation Plan for the 12 ug/m3 PM2.5 Annual Standard
At a public meeting on May 25, 2018, the California Air Resources Board will consider approval of the 2018 State Implementation Plan for the Imperial County 12 ug/m3 Annual PM2.5 Standard.

CARB Documents


2017 State Implementation Plan for the 75 ppb 8-hour Ozone Standard

2018 Updates: In response to court decisions, some elements included in the Imperial County 2017 State Implementation Plan for the 2008 8-hour Ozone Standard 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 Updates to the Califonia State Implementation Plan (Adopted October 25, 2018)



At a public meeting held on October 26, 2017, the California Air Resources Board adopted the Imperial County 2017 State Implementation Plan for the 2008 8-hour Ozone Standard. The Ozone Plan includes, in Appendix B, the Reasonably Available Control Technology Analysis for the 2017 Imperial County State Implementation Plan for the 2008 8-hour Ozone Standard.

CARB Documents


District Documents



2013 State Implementation Plan for the 2006 24-hour PM2.5 Moderate Nonattainment Area
At a public meeting to be held on December 18, 2014, the Air Resources Board approved the Imperial County 2013 State Implementation Plan for the 2006 24-hour PM2.5 Moderate Nonattainment Area.

ARB Documents


District Documents


EPA Documents

2009 1997 8-Hour Ozone Modified Air Quality Management Plan and Reasonably Available Control Technology SIP
At a public meeting held on November 18, 2010, the Air Resources Board approved the Imperial County 2009 1997 8-Hour Ozone Modified Air Quality Management Plan and 2009 Reasonably Available Control Technology State Implementation Plan.  In 2009, U.S. EPA determined that the County attained the 1997 8-hour ozone standard. The following links connect to submittal letters, public notice, ARB staff report and the final ozone plan.

ARB Documents
  • Submittal letter to U.S. EPA
  • ARB Resolution
  • Public Notice to consider the approval of the Imperial County 2009 1997 8-Hour Ozone Modified Air Quality Management Plan and 2009 Reasonably Available Control Technology SIP
  • ARB Staff Report: Analysis of the Imperial County 2009 1997 8-Hour Ozone Modified Air Quality Management Plan and Reasonably Available Control Technology Plan

District Documents

2009 Imperial County PM10 State Implementation Plan (SIP)

At a public meeting held on May 27, 2010, the Air Resources Board considered the approval of the Imperial County 2009 PM10 State Implementation Plan. The information on this page provides links to ARB and District documentation.

ARB Documents       
  • Public Notice to Consider the Approval of the Imperial County 2009 PM10 State Implementation Plan
  • Staff Report: Status Report on Imperial County Air Quality and Approval of the State Implementation Plan Revision for PM10

District Documents

February 2008 Ozone Early Progress Plans

February 2008 Ozone Early Progress Plans
Information regarding the Early Progress Plans for Ventura County, Antelope Valley-Western Mojave Desert, Coachella Valley, Eastern Kern County, and Imperial County.

Appendix




California State Implementation Plan

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