Air Quality This Year
Number of Days in Each AQI Category
AQI numbers calculated according to the latest federal ozone health standard of .075 parts per million averaged over 8 hours.
For pre-2008 values based on the prior National Ambient Air Quality Standard, click the link at the bottom of the page.
     Region    Yolo-Solano Sacramento Placer El Dorado
Maximum AQI
150
Ozone
Wed. 5/27
93
Ozone
Thu. 5/21
145
Ozone
Sat. 6/27
150
Ozone
Wed. 5/27
129
Ozone
Wed. 6/24
VeryUnhealthy 0 0 0 0 0
Unhealthy 0 0 0 0 0
UnhealthySG 17 0 14 6 7
Moderate 13 14 9 21 17
Good 33 49 40 36 39

Preliminary data, subject to revision or deletion.

View 2002-2007 historical air quality