AIRNow Home >> District of Columbia >> Metropolitan Washington
 
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  • Particles Peak
AQI Animation - http://www.epa.gov/airnow/2012/20121231/anim_aqi_washington_dc.gif
Peak AQI - http://www.epa.gov/airnow/2012/20121231/peak_aqi_washington_dc.jpg
Peak Ozone (8-hour) - http://www.epa.gov/airnow/2012/20121231/peak_o3_washington_dc.jpg
Peak Particles PM<sub>2.5</sub> (24-hour) - http://www.epa.gov/airnow/2012/20121231/peak_pm25_washington_dc.jpg
 
AQI: Good (0 - 50) AQI: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) Action DayAction Day
 
Local Air Quality Resources
Action Day Programs | Forecast
 
State Air Quality Resources
American Lung Association (ALA) of the District of Columbia
District Department of the Environment
District Dept. of the Environment - Contacts
District of Columbia - Emergency Management Agency - Air Quality Indexes
Metropolitan Washington Council of Governments - Air Quality Information
Daily Peaks
Monday, December 31, 2012
Particles PM2.5
34 
 Good
Ozone
14 
 Good
select another date to see peak data and maps:
Note: peak data are available beginning August 1, 2010.

Other Information
Current Conditions and Forecasts
Air Quality Maps Archives (by region)