California Air Resources Board

Chapter 3: Statewide Trends and Forecasts

1. Introduction
   1. Emission Trends and Forecasts
   2. Statewide Population and VMT
2. Emission Trends and Forecasts
   1. NO_x
   2. VOC
   3. Directly Emitted Particulate Matter (PM_2.5)
   4. Directly Emitted Particulate Matter (PM₁₀)
   5. Diesel PM
   6. Sulfur Dioxide
   7. Ammonia

Figures in Chapter 3

3-1 Percent Change in Air Quality and Growth
3-2 Statewide NO_x Emission Trends
3-3 Statewide VOC Emission Trends
3-4 Statewide Directly Emitted PM_2.5 Emission Trends
3-5 Statewide Diesel PM Emission Trends
3-6 Statewide SO_x Emission Trends
3-7 Statewide Ammonia Emission Trends

Tables in Chapter 3

Chapter 2: Current Emissions and Air Quality

1. Introduction
2. Emission Sources
   1. NO_x Sources Statewide
   2. VOC Sources Statewide
   3. Directly Emitted Particulate Matter (PM_2.5)
   4. Directly Emitted Particulate Matter (PM₁₀)
   5. SO_x Sources Statewide
   6. Ammonia Sources Statewide
   7. Diesel PM Sources Statewide
   1. 2012 Statewide Emission Inventory
   2. 2012 Statewide Emission Inventory by Sub-Category
3. 2011 Statewide Air Quality
   1. Ozone
   2. Particulate Matter (PM_2.5)
   3. Carbon Monoxide (CO), Nitrogen Dioxide (NO₂), Sulfure Dioxide (SO₂)

Figures in Chapter 2

No figures in Chapter 2

Tables in Chapter 2

Chapter 1: Introduction

1. Overview
2. Organization
3. California Facts and Figures
4. Quick Facts
5. Interpreting the Emission and Air Quality Statistics
6. Meteorology's Role in Air Quality
7. Sources of Emissions in California
8. Air Quality Monitoring
9. California Air Basins
10. Criteria Air Pollutants
    1. National Ambient Air Quality Standards
       1. Ozone
       2. Ozone National Area Designations
       3. Particulate Matter (PM_2.5)
       4. Particulate Matter (PM_2.5) Area Designations
       5. Carbon Monoxide, Nitrogen Dioxide, and Sulfur Dioxide
       6. Air Quality Standards Table
11. Web Resources

Figures in Chapter 1

1-1 People Living in Areas Meeting or Exceeding the 8-Hour Ozone Standard
1-2 California Air Quality Monitoring Sites
1-3 California Air Basins
1-4 National 8-Hour Ozone Designations
1-5 National PM_2.5 Designations

Tables in Chapter 1

Preface and Table of Contents

This almanac was prepared and published by the California Air Resources Board (CARB) staff to aid air quality professionals and the public in evaluating air quality in California (State). The CARB, as part of the California Environmental Protection Agency (CalEPA), is the State board responsible for achieving and maintaining healthful air quality in California. This responsibility is shared with local air districts and the United States Environmental Protection Agency (U.S. EPA).

The following staff and managers of the Air Quality Planning and Science Division contributed to the production of this almanac: Jagjeet Arce, Stephen Francis, Martin Johnson, Vivian Lerch, LinYing Li, Elizabeth Melgoza, Chris Nguyen, Michael Redgrave, Jon Taylor, and Xijie Zhang. The project was approved by Kurt Karperos, Chief of the Air Quality Planning and Science Division. The project was managed by Karen Magliano, Assistant Division Chief, Carla Takemoto, Chief of the Area Source & Emission Inventory Programs Branch, Sylvia Vanderspek, Chief of the Air Quality Planning Branch, Stephen Zelinka, Manager of the Emission Inventory Development Section, Mena Shah, Manager of the Air Quality & Statistical Studies Section, and Gayle Sweigert, Manager of the Air Quality Analysis Section.

This is the eleventh edition of this almanac which has been updated annually as additional air quality and emission inventory data become available. If you find errors or have suggestions for improvements, please let us know. For general issues or issues related to air quality data, contact Paul Andrews at (916) 327-7609. For issues related to emissions data, contact the Emission Inventory Branch at (916) 323-8461.

Table of Contents

Chapter 1: Introduction

1. Overview
2. Organization
3. California Facts and Figures
4. Quick Facts
5. Interpreting the Emission and Air Quality Statistics
6. Meteorology's Role in Air Quality
7. Sources of Emissions in California
8. Air Quality Monitoring
9. California Air Basins
10. Criteria Air Pollutants
    1. National Ambient Air Quality Standards
       1. Ozone
       2. Ozone National Area Designations
       3. Particulate Matter (PM_2.5)
       4. Particulate Matter (PM_2.5) Area Designations
       5. Carbon Monoxide, Nitrogen Dioxide, and Sulfur Dioxide
       6. Air Quality Standards Table
11. Web Resources

Chapter 2: Current Emissions and Air Quality

1. Introduction
2. Emission Sources
   1. NO_x Sources Statewide
   2. VOC Sources Statewide
   3. Directly Emitted Particulate Matter (PM_2.5)
   4. Directly Emitted Particulate Matter (PM₁₀)
   5. SO_x Sources Statewide
   6. Ammonia Sources Statewide
   7. Diesel PM Sources Statewide
   1. 2012 Statewide Emission Inventory
   2. 2012 Statewide Emission Inventory by Sub-Category
3. 2011 Statewide Air Quality
   1. Ozone
   2. Particulate Matter (PM_2.5)
   3. Carbon Monoxide (CO), Nitrogen Dioxide (NO₂), Sulfure Dioxide (SO₂)

Chapter 3: Statewide Trends and Forecasts

1. Introduction
   1. Emission Trends and Forecasts
   2. Statewide Population and VMT
2. Emission Trends and Forecasts
   1. NO_x
   2. VOC
   3. Directly Emitted Particulate Matter (PM_2.5)
   4. Directly Emitted Particulate Matter (PM₁₀)
   5. Diesel PM
   6. Sulfur Dioxide
   7. Ammonia

Chapter 4: Regional Trends and Forecasts

1. Introduction
2. South Coast Air Basin
   1. Introduction
   2. Emissions Trends and Forecasts
      1. Basinwide Trends/Population and Vehicle Miles Traveled
      2. Ozone Precursor Emissions
      3. Directly Emitted PM_2.5 Emissions
      4. Diesel PM Emissions
      5. Ammonia Emissions
   3. Air Quality
      1. Ozone
      2. Particulate Matter (PM_2.5)
      3. Nitrogen Dioxide
3. San Francisco Bay Area Air Basin
   1. Introduction
   2. Emissions Trends and Forecasts
      1. Basinwide Trends/Population and Vehicle Miles Traveled
      2. Ozone Precursor Emissions
      3. Directly Emitted PM_2.5 Emissions
      4. Diesel PM Emissions
      5. Ammonia Emissions
   3. Air Quality
      1. Ozone
      2. Particulate Matter (PM_2.5)
      3. Nitrogen Dioxide
4. San Joaquin Valley Air Basin
   1. Introduction
   2. Emissions Trends and Forecasts
      1. Basinwide Trends/Population and Vehicle Miles Traveled
      2. Ozone Precursor Emissions
      3. Directly Emitted PM_2.5 Emissions
      4. Diesel PM Emissions
      5. Ammonia Emissions
   3. Air Quality
      1. Ozone
      2. Particulate Matter (PM_2.5)
      3. Nitrogen Dioxide
5. San Diego Air Basin
   1. Introduction
   2. Emissions Trends and Forecasts
      1. Basinwide Trends/Population and Vehicle Miles Traveled
      2. Ozone Precursor Emissions
      3. Directly Emitted PM_2.5 Emissions
      4. Diesel PM Emissions
      5. Ammonia Emissions
   3. Air Quality
      1. Ozone
      2. Particulate Matter (PM_2.5)
      3. Nitrogen Dioxide
6. Sacramento Valley Air Basin
   1. Introduction
   2. Emissions Trends and Forecasts
      1. Basinwide Trends/Population and Vehicle Miles Traveled
      2. Ozone Precursor Emissions
      3. Directly Emitted PM_2.5 Emissions
      4. Diesel PM Emissions
      5. Ammonia Emissions
   3. Air Quality
      1. Ozone
      2. Particulate Matter (PM_2.5)
      3. Nitrogen Dioxide

Appendix A: Air Quality Trend Data by Pollutant: Ozone, PM_2.5, CO, NO₂, SO₂

1. Introduction
2. Ozone
3. PM_2.5
4. Carbon Monoxide
5. Nitrogen Dioxide
6. Sulfur Dioxide

Appendix B: County Level Emissions and Air Quality by Air Basin

1. Introduction
2. Emission Inventory
   1. 2012 Emissions
   2. VOCs
   3. NO_x
   4. SO_x
   5. PM_2.5
   6. PM₁₀
   7. Diesel PM
   8. Ammonia (NH₃)
3. Air Quality
   1. Great Basin Valleys Air Basin
   2. Lake County Air Basin
   3. Lake Tahoe Air Basin
   4. Mojave Desert Air Basin
   5. Mountain Counties Air Basin
   6. North Central Coast Air Basin
   7. North Coast Air Basin
   8. Northeast Plateau Air Basin
   9. Sacramento Valley Air Basin
   10. Salton Sea Air Basin
   11. San Diego Air Basin
   12. San Francisco Bay Area Air Basin
   13. San Joaquin Valley Air Basin
   14. South Central Coast Air Basin
   15. South Coast Air Basin

Appendix C: Surface Area, Population, and Average Daily Vehicle Miles Traveled

1. Introduction
2. California Population and Vehicle Miles Traveled
3. Surface Area by County
4. Population and Vehicle Miles Traveled by County, Air Basin, and Air District

Appendix D: Natural Sources

1. Introduction
2. Biogenic Sources
3. Geogenic Sources
4. Wildfires

Appendix E: Lists of Figures and Tables for Chapters 1 through 4

1. Figures
2. Tables
3. Glossary of Air Quality Terms

This almanac was prepared and published by the staff of the Air Quality Planning and Science Division, California Air Resources Board. Principal authors: Paul Andrews, Andy Delao, and Anna Komorniczak.

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

The almanac is currently available for download in its entirety or by section. In addition, individual data tables from the almanac are available in comma separated (.csv) formats or you can download a zipped version of all tables.

For general information about the almanac or questions about the air quality data, contact Paul Andrews. For questions about the emissions data, contact the Emission Inventory Branch.

Notice: Early versions of the CD and web version of the 2013 Almanac had some incorrect emissions values. For more details on changes made, see the Errata Sheet.

• Preface and Table of Contents
• Chapter 1: Introduction
• Chapter 2: Current Emissions and Air Quality
• Chapter 3: Statewide Emission Trends and Forecasts
• Chapter 4: Regional Trends and Forecasts
• Appendix A: Air Quality Trend Data by Pollutant: Ozone, PM_2.5, CO, NO₂, SO₂
• Appendix B: County Level Emissions and Air Quality by Air Basin
• Appendix C: Surface Area, Population, and Average Daily Vehicle Miles Traveled
• Appendix D: Natural Sources
• Appendix E: Lists of Figures and Tables for Chapters 1 through 4

The air quality trends presented in the California Almanac of Emissions and Air Quality - 2013 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 of 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 2013 Almanac.

Listed below is the rulemaking schedule for the air districts that have planned a workshop or hearing for proposed amendments to their architectural coatings rules, consistent with the Suggested Control Measure (SCM).

The list is provided solely as an information service. Each individual air district is responsible for their rulemaking schedule. The California Air Resources Board is not responsible for scheduling dates, times, or locations of the workshops and/or hearing or any changes of those dates and times. Therefore, the dates listed are subject to change by the air districts. It is recommended that if you are interested in attending a workshop or hearing that you contact the individual air district prior to making travel plans.

Districts that have adopted the Suggested Control Measure

Recent and historical State Implementation Plan (SIP) activity related to San Diego County Air Pollution Control District. 

• 2020 San Diego Ozone State Implementation Plan
• 2017 San Diego Ozone State Implementation Plan
• 2012 San Diego 8-Hour National Ozone Implementation/Maintenance Plan and Redesignation Request
• 2007 San Diego 8-Hour Ozone Plan
• 2004 Revisions to the Carbon Maintenance Plan
• 1998 Revisions to the Carbon Monoxide Maintenance Plan
• Final Carbon Monoxide Redesignation Request and Maintenance Plan for Ten Federal Planning Areas