AQI Forecast by County
Thursday, September 29
Thu Fri
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 (Thu, Sept 29)
48 AQI - Good
Tomorrow (Fri, Sept 30)
74 AQI - Moderate

Yesterday's High Extended AQI Outlook
Wed, Sept 28
42 AQI - Good
Sat, Oct 1
Sun, Oct 2
Mon, Oct 3

Air Quality Forecast and Weather Discussion
Wednesday, an upper-level trough of low pressure passing north of the region will enhance atmospheric mixing. Additionally, moderate southerly winds will disperse pollutants throughout the day. Therefore, despite warm temperatures supporting ozone development, ozone levels will remain high-Good, and particle levels will be Good. Thursday, winds will shift to northwesterly, aiding dispersion and transporting clean air into the Sacramento region. In addition, pollutant carryover from the previous day will be low. Thus, ozone levels will remain high-Good, while particle levels will be Good. Friday, light and variable winds will allow pollutants to accumulate over the Sacramento region. In addition, sunny skies and high temperatures near 90F will promote ozone formation. As a result, particle levels will increase to high-Good, and ozone levels will increase into the Moderate category.