This section contains selected ozone animations that show how ozone patterns change over the course of a given day - as a map of the Bay Area changes color according to the Air Quality Index scale.
Today’s Current Hour Still Image
Yesterday's peak 8-hr average
Note: Yesterday’s maps are not available until around 9am the following morning.
This morning, smoke from a fire at a Concord warehouse has impacted local air quality in parts of Contra Costa and Alameda Counties.
Air Quality Index
Ozone Health Effects