AIRNow - Air Quality Maps

A cross-agency U.S. Government Web site. List of AIRNow partner agencies

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The AQI for...
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Key Topics:
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Accessibility

United States Air Quality Maps

Ozone and Particulate Matter (PM2.5) data are published as soon as practical after the end of each hour and as such are not fully validated. Maps are also archived in the same way. Therefore, data are only approved for the expressed purpose of reporting and forecasting the Air Quality. Maps are generally available after 9 a.m. EST.

Pollutant:

Ozone | Particles (PM2.5)

Map Area:

Map Date:

Map Type:

Current Hour AQI	8-Hour AQI Loop
8-Hour Peak AQI	1-Hour Average Peak Concentration

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Ozone Monitor Locations | How are the AQI maps calculated? | Why is the map not available?

Ozone season for the United States is year-round.

Ozone: Current Hour AQI	United States
	Monday, September 15, 2008 08:52 PM EDT

http://www.epa.gov/airnow/current/super_current_hour.gif

1 - 50
Good

51 - 100
Moderate

101 - 150
Unhealthy for
Sensitive Groups

151 - 200
Unhealthy

201 - 250
Very Unhealthy

Data Not Available

Ozone: 8-Hour AQI Loop	United States
	Monday, September 15, 2008