

AQI Forecast by County
Wednesday, April 14
Wed | Thu | |
Placer | 42 | 38 |
Sacramento | 42 | 46 |
Yolo-Solano | 38 | 42 |
Air Quality Map
Federal and State Ground-level Ozone Exceedances
Sacramento Region
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* A new federal 8-hour ozone standard of .070 parts per million began in October 2015.
** A new federal 8-hour ozone standard of .075 parts per million began in 2008.
*** The federal 8-hour ozone standard of .084 parts per million was in effect from 1999-2007.
**** There was no federal 8-hour ozone standard prior to 1999.
Note: As of June 15, 2005, the federal 1-hour ozone standard was revoked, but it still has regulatory applicability in some areas.