The California Almanac of Emissions and Air Quality - 2006 Edition

This page last reviewed January 14, 2010

This almanac was prepared and published by the staff of the Planning and Technical Support Division, California Air Resources Board. Principal authors: Paul Cox, Martin Johnson, and Janelle Auyeung.

This document has been reviewed and approved by the staff of the California Air Resources Board. Approval does not signify that the contents necessarily reflect the views and policies of the Air Resources Board.

The almanac is currently available for download in PDF format. You may download the entire Adobe Acrobat document (PDF - 7.7 MB), or you may view the contents of each section in PDF format by clicking on the links provided below. The PDF files are best viewed using Adobe Acrobat Reader which is available for free download at The PDF files may be navigated page-by-page or with the bookmark navigation pane which will be opened automatically.

In addition to the PDF files, individual data tables from the almanac are available for download in both Excel (.xls) and text (.txt) formats. The tables for each chapter and appendix can be accessed by clicking below on the links to the Preface and Table of Contents or the links to the individual chapters and appendices. Alternatively, you may click here to download a zipped version of all the tables in Excel format (2 MB) or text format (291 kb).

For general information about the almanac or questions about the air quality data, please contact Paul Cox ( For questions about the emissions data, please contact Martin Johnson ( For questions about the air toxics data, please contact Janelle Auyeung (

The air quality trends presented in The California Almanac of Emissions and Air Quality - 2006 Edition represent a summary of data collected at a number of monitoring sites. Whenever data are summarized, the results can be influenced by many factors, including the number monitoring sites in the network, the opening and closing of critical sites, and the completeness of the data. The following document, updated during December 1998, provides information that is helpful for interpreting air quality trends in the 2006 Alamanac.

Clarifying Information for Interpreting Air Quality Trends

The emissions trends presented in The California Almanac of Emissions and Air Quality - 2006 Edition are available to view and download for the years 1975 - 2020 through this link:

Criteria Emissions

The most recent updates to selected categories are available through the following link:

Interim Emissions Updates

If you have problems finding materials on this website, please contact us at: (916) 322-3260 or (800) 242-4450.