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
Wednesday, April 26 at 8:17 AM
5 County Map
Wed
Thu
Fri
Sat
Sun
North Counties
32
34
G
G
G
OZONE
OZONE
OZONE
PM2.5
OZONE
Coast and Central Bay
31
33
G
M
M
OZONE
OZONE
OZONE
PM2.5
PM2.5
Eastern District
31
37
G
G
M
OZONE
OZONE
OZONE
OZONE
OZONE
South Central Bay
30
35
G
G
G
OZONE
OZONE
OZONE
OZONE
OZONE
Santa Clara Valley
32
38
G
G
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.