Links to many different kinds of bad air data: air quality trends, real time pollution level maps and monitoring readouts, studies and much more.

• Daily Air Quality Status and Forecast (SJVAPCD)
• Air Quality Maps of the San Joaquin Valley with maps displaying ambient air quality data collected by the real-time air monitoring networks operated by the Valley Air District and CARB
• Today's Ozone and Particulate Matter Movies (AIRNow)
• 2003 - present Annual Ozone Summary (CARB)
• CARB California Air Quality Data - most recent air quality, yesterday's ozone, historical air quality, California almanac, air quality monitoring network, special studies, etc.
• Real time query tool (CARB) - by county, air basin or part of state
• 2003 California Almanac of Emissions and Air Quality (CARB) - past, current and future air quality trends
• Detailed Ozone Exceedances 1998-2001
• Community Health Air Pollution Information System (CHAPIS) - find your neighborhood on the interactive air pollution map
• CARB air quality data and statistics - good for detailed searches
• Diesel Soot Health Impacts (Clean Air Task Force) - statistics on the effect of diesel pollution on your community