AQI Forecast By County
Tuesday, September 27
Tue Wed
El Dorado
133
87
Placer
133
80
Sacramento
129
74
Yolo-Solano
101
51

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


Forecast will be issued daily by noon (PDT)

A "!" next to a forecast means a Spare The Air Day has been declared for that day.
 
Forecast: AQI   Pollutant
Tue. September 27, 2016:
 129 
Ozone   !   
Wed. September 28, 2016:
 74 
Ozone    
 
Extended Forecast: Condition Pollutant
Thu. September 29, 2016:
Good  Good
Ozone    
Fri. September 30, 2016:
Good  Good
Ozone    
Sat. October 01, 2016:
Good  Good
Ozone    
Sun. October 02, 2016:   Ozone    
 
Actual: AQI   Pollutant
Mon. September 26, 2016:
 101 
Ozone    

Weather Conditions:
Monday, calm winds will reduce pollutant dispersion in the Sacramento area. In addition, an upper-level ridge of high pressure over California will limit vertical mixing and produce temperatures in the upper-90s. These conditions will enhance ground-level ozone formation. As a result, ozone levels will be Unhealthy for Sensitive Groups. Tuesday is a Spare The Air Day in the Sacramento region. Continued warm temperatures and sunny skies will increase ozone production, and light and variable winds will inhibit pollutant dispersion. In addition, smoke from the Sawmill fire in Sonoma County may impact the Sacramento region, further enhancing ozone formation. Therefore, ozone levels will remain Unhealthy for Sensitive Groups. Wednesday, moderate onshore winds will help to keep the low levels of the atmosphere well mixed. In addition, cooler temperatures will limit ozone formation. Therefore, despite pollutant carryover from Monday and Tuesday, ozone levels will be Moderate.