AQI Forecast by County
Tuesday, June 18
Tue Wed
El Dorado

Air Quality Map
The map below is a 1-hour snapshot. Click to view all hours recorded since midnight.
Current map

Do You Know Current Air Pollution Levels?
Check air quality conditions before you go outside. Smog increases throughout the day and it will be the highest in late-afternoon or early evening.

Download the free Sacramento Region Air Quality app today. You'll get air pollution readings from monitors throughout the region, the daily forecast, plus Spare The Air alerts.

You may also visit this site's Current Conditions to see the latest hourly air pollution readings.

A Spare The Air alert in the Sacramento region will be issued when the AQI for ground-level ozone pollution is forecast to reach 126 or above.

Sacramento Region Ozone Air Quality Forecast updated by noon
Today (Tue, June 18)
112 AQI - Unhealthy for Sensitive Groups
Tomorrow (Wed, June 19)
93 AQI - Moderate

Yesterday's High Extended AQI Outlook
Mon, June 17
87 AQI - Moderate
Thu, June 20
Fri, June 21
Sat, June 22

Air Quality Forecast and Weather Discussion
Monday, as an upper-level ridge of high pressure builds over the Sacramento region, warmer temperatures will increase ozone formation. In addition, onshore winds will weaken slightly, reducing mixing and dispersion. Therefore, ozone levels will be Unhealthy for Sensitive Groups. Tuesday, upper-level high pressure will continue to strengthen over the Sacramento region, reducing mixing and producing sunny skies and temperatures in the upper-90s to low-100s. These conditions will enhance the formation of ground-level ozone. However, light to moderate northwesterly to southwesterly winds will increase pollutant dispersion. As a result, ozone levels will remain Unhealthy for Sensitive Groups. Wednesday, the high pressure ridge will begin to weaken, enhancing atmospheric mixing. Furthermore, moderate onshore winds in the afternoon will disperse pollutants. Therefore, ozone levels will be Moderate.