Bay Area Ozone Movies

Although the Bay Area is one of the cleanest of the five major urban air basins in California, there are still several days annually when air pollution exceeds the state or federal air quality standards.

Click on a link below to view an animated depiction of daily ozone development patterns, overlaid on a map of the Bay Area.

Bay Area Ground-Level Ozone maps:
Today’s Animation
Today’s Current Hour Still Image
Yesterday’s Animation
Yesterday's peak 8-hr average
Yesterday's peak 1-hr average
Note: Yesterday’s maps are not available until around 9am the following morning.