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Home > Environment > Air Quality > Data

Air Quality Data

Yesterday's Air Quality Index Report

Date
Yesterday's AQI
Aug 23, 2007
yellow
74
Lead Pollutant: PM2.5

Detailed air quality data for the Washington, DC Metropolitan area can be found on the Air Watch web site.

The Council of Governments has prepared the following data reports on regional air quality:

Air Quality Index (AQI) Scale
AQI Range
AQI Category
AQI Colors
0 - 50
Good
green
51 - 100
Moderate
yellow
101 - 150
Unhealthy for
Sensitive Groups
orange
151 - 200
Unhealthy
red
201 - 300
Very Unhealthy
purple


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