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AQI Forecast by County
Wednesday, September 18
Wed Thu
El Dorado
37
43
Placer
36
41
Sacramento
35
41
Yolo-Solano
28
33

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 (Wed, Sept 18)
37 AQI - Good
Tomorrow (Thu, Sept 19)
43 AQI - Good

Yesterday's High Extended AQI Outlook
Tue, Sept 17
42 AQI - Good
Ozone
Fri, Sept 20
Good
Sat, Sept 21
Moderate
Sun, Sept 22
Moderate

Air Quality Forecast and Weather Discussion
Wednesday and Thursday, an upper-level trough of low pressure will pass through the Sacramento Valley, which will increase atmospheric mixing and dispersion. Additionally, cooler temperatures will inhibit ozone production. These conditions will lead to Good ozone levels on both days. Friday, as an upper-level ridge of high pressure advances toward northern California, mixing in the lower levels of the atmosphere will decrease. Furthermore, sunny skies and warmer temperatures will increase ozone development. However, low pollutant carryover from previous days will allow ozone levels to be high-Good for the region.