Metropolitan Washington
 
  • AQI Loop
  • AQI
  • Ozone AQI
  • PM2.5 AQI
AQI Animation - http://www.epa.gov/airnow/2013/20130119/anim_aqi_washington_dc.gif
Peak AQI - http://www.epa.gov/airnow/2013/20130119/peak_aqi_washington_dc.jpg
Peak Ozone (8-hour) - http://www.epa.gov/airnow/2013/20130119/peak_o3_washington_dc.jpg
Peak Particles PM<sub>2.5</sub> (24-hour) - http://www.epa.gov/airnow/2013/20130119/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 AQI
Saturday, January 19, 2013
Particles PM2.5
23 
Good
Particles PM10
11 
Good
Ozone
28 
Good
select another date to see data and maps:
Note: data are available beginning August 1, 2010.

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