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This almanac was prepared and published by the staff of the Planning and Technical Support Division, California
Air Resources Board. Principal authors: Andy Alexis, Paul Cox, Anne Lin, Chris Nguyen, and Marcella Nystrom.
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
- 7.6 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 www.adobe.com.
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 (1.1
MB) or text format (237 kb).
For general information about the almanac or questions about the air quality
data, please contact Paul Cox (pcox@arb.ca.gov).
For questions about the emissions data, please contact Andy Alexis (aalexis@arb.ca.gov).
- Note from Chairman, Preface, and Table of Contents
- Chapter 1: Introduction
- Chapter 2: Current Emissions and Air Quality -- Criteria Pollutants
- Chapter 3: Statewide Trends and Forecasts -- Criteria Pollutants
- Chapter 4: Air Basin Trends and Forecasts -- Criteria Pollutants
- Chapter 5: Toxic Air Contaminant Emissions, Air Quality, and Health Risk
- Appendix A: County Level Emissions and Air Quality by Air Basin
- Appendix B: Air Quality Trend Data by Pollutant: Ozone, PM10, CO, NO2, SO2
- Appendix C: Emissions, Air Quality, and Health Risk for Ten Toxic Air Contaminants
- Appendix D: Surface Area, Population, and Average Daily Vehicle Miles Traveled
- Appendix E: Lists of Figures and Tables for Chapters 1 through 5
The air quality trends presented in The 2003 California Almanac of Emissions and Air Quality 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 2003 Alamanac.
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