tips

AQI Forecast by County
Thursday, September 21
Thu Fri
El Dorado
37
44
Placer
37
44
Sacramento
36
43
Yolo-Solano
36
42

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
Thu. September 21, 2017:
 36 
Ozone    
Fri. September 22, 2017:
 43 
Ozone    
 
Extended Forecast: Condition Pollutant
Sat. September 23, 2017:
Good  Good
Ozone    
Sun. September 24, 2017:
Moderate  Moderate
Ozone    
Mon. September 25, 2017:
Good  Good
Ozone    
Tue. September 26, 2017:
Moderate  Moderate
Ozone    
 
Actual: AQI   Pollutant
Wed. September 20, 2017:
 27 
Ozone    

Weather Conditions:
Thursday through Saturday, an upper-level trough of low pressure over California will increase mixing in the atmosphere and produce moderate winds. In addition, cool temperatures will limit ozone formation. These conditions will yield Good ozone levels on all three days.