AQI Forecast by County
Monday, September 23
Mon Tue
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 (Mon, Sept 23)
48 AQI - Good
Tomorrow (Tue, Sept 24)
77 AQI - Moderate

Yesterday's High Extended AQI Outlook
Sun, Sept 22
51 AQI - Moderate
Wed, Sept 25
Thu, Sept 26
Fri, Sept 27

Air Quality Forecast and Weather Discussion
Sunday, as an upper-level ridge of high pressure moves east of the Sacramento Valley, vertical mixing will remain inhibited. In addition, partly sunny skies and temperatures in the mid- to upper-80s will aid ozone formation, while light onshore winds will allow pollutants to accumulate. These conditions will lead to low-Moderate ozone levels. Monday, an upper-level trough of low pressure will move across the Sierra Nevada mountain range, which will enhance vertical mixing. Furthermore, moderate and gusty northwesterly winds will disperse pollutants. Therefore, despite sunny skies and temperatures near 90F aiding ozone formation, ozone levels will lower to high-Good. Tuesday, an upper-level ridge of high pressure off the California coast will limit mixing and dispersion. Additionally, sunny skies combined with temperatures in the mid-90s will enhance ozone formation. As a result, ozone levels will be Moderate.