AQI Forecast by County
Monday, September 27
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 PM2.5 Air Quality Forecast updated by noon
Today (Mon, Sept 27)
59 AQI - Moderate
Tomorrow (Tue, Sept 28)
57 AQI - Moderate

Yesterday's High Extended AQI Outlook
Sun, Sept 26
52 AQI - Moderate
Wed, Sept 29
Thu, Sept 30
Fri, Oct 1

Air Quality Forecast and Weather Discussion
Sunday, as a trough of low pressure approaches northern California, moderate onshore flow will increase dispersion and transport cooler air into the region. However, mostly sunny skies will aid ozone formation. In addition, wildfire smoke will continue to impact the foothills, leading to increased particle concentrations in portions of El Dorado and Placer Counties. As a result, AQI levels will be in the low-Moderate category for both particles and ozone. Monday, as the upper-level trough moves into northern California, onshore winds will strengthen in the afternoon, dispersing pollutants and bringing clean air into the Sacramento region. These conditions will lead to Good ozone and particle levels throughout most of the Sacramento region. However, smoke from the Caldor Fire will continue to impact portions of El Dorado County, leading to low-Moderate particle levels there. Tuesday, moderate and gusty north-northwesterly winds behind a departing weak cold front will keep pollutants well dispersed. As a result, ozone levels will be Good throughout the Sacramento region. However, these winds will transport a thin plume of smoke from the Fawn Fire in Shasta County into Yolo, Solano, and Sacramento Counties, leading to low-Moderate particle levels in those areas.