Metropolitan Washington
 
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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
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
25 
Good
Health Message: None
Air Quality Index (AQI)
46 
Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5)
25 
Good
Particles (PM2.5)
46 
Good
Forecast Discussion: A weak high pressure system is forecast to move over our area during the early morning hours Friday. Winds will be light, however cold air aloft will keep mixing heights high. Expect Good AQI throughout the area. A much stronger high pressure system will begin to make its way south into the Great Lakes region on Saturday. This will set up a brisk northwest wind, keeping temperatures cold but also keeping fine particle concentrations low. As the high settles over us during the day on Monday, winds will decrease and subsidence will increase. Expect fine particle concentrations to rise, but should remain within the Good AQI range. -MDE

Current Conditions
Air Quality Index (AQI)
observed at 13:00 EST
34
Good
Health Message: None
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.
AQI - Pollutant Details
Particles (PM2.5) 34 Good
Ozone 30 Good
Particles (PM10) 17 Good

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