Metropolitan Washington
 
Data courtesy of:
 

 
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)
33 
Good
Health Message: None
Air Quality Index (AQI)
55 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5)
33 
Good
Particles (PM2.5)
55 
Moderate
Forecast Discussion: Continued northerly winds behind New England’s Nor’ Easter will continue Good air quality in Maryland on Wednesday. Winds subside as high pressure moves in on Thursday. Remaining snow on the ground will exacerbate the high pressure created inversion, causing a sharp increase in fine particle concentrations to the Moderate range on Thursday. However, another cold front moves through early on Friday with strong northwest winds quickly returning Good air quality to the region. - MDE

Current Conditions
Air Quality Index (AQI)
observed at 6:00 EST
36
Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5) 36 Good
Ozone 24 Good
Particles (PM10) 0 Good

Past Air Quality Maps and Data
Yesterday's Maps and Data
Air Quality Maps Archives (by region)

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