Five Day

Forecast

The Air District issues a daily air quality forecast that predicts air pollution levels for the coming five-day period.  This forecast uses the U.S. EPA's Air Quality Index scale.

For forecasting purposes, cities in the Bay Area have been divided into five reporting zones. The cities within each reporting zone are listed here.

5 Day Forecast

Air Quality Forecast
Thursday, April 27 at 9:23 AM
5 County Map
Thu
Fri
Sat
Sun
Mon
North Counties
34
40
G
G
M
OZONE
OZONE
OZONE
OZONE
OZONE
Coast and Central Bay
33
39
G
G
G
OZONE
OZONE
OZONE
OZONE
OZONE
Eastern District
37
41
G
M
M
OZONE
OZONE
OZONE
OZONE
OZONE
South Central Bay
35
38
G
G
G
OZONE
OZONE
OZONE
OZONE
OZONE
Santa Clara Valley
38
42
G
M
M
OZONE
OZONE
OZONE
OZONE
OZONE

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Scheduled Maintenance

Air District systems will undergo planned maintenance from 8am Friday 4/28 through 11pm Sunday 4/30.
There may be disruptions in some services. We apologize for any inconvenience.