Current Air Quality

Air Quality Index (AQI) - Basics (Daily AQI Color, Levels of Concern, Value of Index, and Description of Air Quality)

Current Air Quality (AQI) (Updated Hourly) 

AQI Calculator (Convert AQI to Concentration and/or Covert Concentration to AQI) 

Fire and Smoke Map  (Interactive Map of Air Quality)

Fire and Smoke Map  (How-To Video)

Air Quality and Outdoor Activity Guidance for Schools (Guidance Chart)                  

The Air Quality Data page provides access to ambient air quality data, maps of areas that violate the national and state air quality standards, and maps of the ambient air quality monitoring network. The California Air Resources Board uses the Emissions Inventory and Air Quality Models to evaluate air quality and reduce emission in each of the 35 local air districts.