Current Air Quality

Air Quality Monitoring

  • The US Environmental Protection Agency provides the current Air Quality Index (AQI) for Tuolumne County for ozone and an air quality forecast for the next day for only ozone. 
  • During the wildfire season, to access the AQI for wildfire smoke, please use the following link:; click on PM2.5 in the Monitor and Contour (NowCast AQI fields) and scroll into California and the Motherlode for current levels. 
  • The California Air Resources Board (CARB) alsoreports current ozone levels in downtown Sonora and throughout California on its ozone map.
  • Recent and historic air quality data recorded by CARB is also available.
  • The National Oceanic and Atmospheric Administration (NOAA) provides an air quality forecast map for the United States.

Webcams in Tuolumne County

Several webcams show real time images of various areas of Tuolumne County: