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
Tuesday, September 30 at 9:59 AM
5 County Map
Tue
Wed
Thu
Fri
Sat
Northern
Zone
50
42
M
M
M
PM2.5
PM2.5
PM2.5
PM2.5
PM2.5
Coast and Central Bay
53
46
M
M
M
PM2.5
PM2.5
PM2.5
PM2.5
PM2.5
Eastern
Zone
41
49
M
M
M
OZONE
OZONE
OZONE
OZONE
OZONE
South Central Bay
46
38
M
M
M
PM2.5
PM2.5
PM2.5
PM2.5
PM2.5
Santa Clara Valley
38
64
M
M
M
OZONE
OZONE
OZONE
OZONE
OZONE

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