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Air Quality Data

Daily Air Quality Status and Forecast
Observed data is preliminary and subject to change
To make sure you have the latest information, please refresh this page.
This page is updated daily at 4:30pm.


The national ambient air quality standards for ground-level ozone have changed.
As a result, the AQI calculations have been revised. Please visit EPA 's website for more details.

Forecast for 5/10/2008




School Air-Quality Flags
The colors on the map correspond to the color of the school flag for your county.

More Information
  • If you are interested in more information about the Air Quality Index, click here.

  • Air Quality Index cautionary statements for ozone can be found here.

  • Air Quality Index cautionary statements for particulate matter can be found here.
    		•
    County Observed:
    5/8/2008    		 Updated Forecast for:
    5/9/2008    		 Forecast for:
    5/10/2008
    San Joaquin 47 Good (O3) 45 Good (O3) 43 Good (O3)
    Stanislaus 47 Good (O3) 47 Good (O3) 45 Good (PM2.5)
    Merced 54 Moderate (O3) 51 Moderate (O3) 50 Good (O3)
    Madera 51 Moderate (O3) 54 Moderate (O3) 51 Moderate (O3)
    Fresno 74 Moderate (O3) 77 Moderate (O3) 74 Moderate (O3)
    Kings 54 Moderate (O3) 61 Moderate (O3) 58 Moderate (O3)
    Tulare 71 Moderate (O3) 77 Moderate (O3) 90 Moderate (O3)
    Kern (SJV Air Basin portion) 84 Moderate (O3) 90 Moderate (O3) 87 Moderate (O3)
    NA—insufficient data to calculate an AQI.