Metropolitan Washington
 
Data and Forecasts courtesy of:
 

 
AQI: Good (0 - 50) AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100) AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) AQI: Unhealthy (151 - 200)
Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
 AQI:Very Unhealthy (201 - 300) AQI: Very Unhealthy (201 - 300)
Health alert: everyone may experience more serious health effects.
AQI: Hazardous(301 - 500) AQI: Hazardous (301 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
Action DayAction Day
 
Local Air Quality Resources
 
State Air Quality Resources
American Lung Association (ALA) of the District of Columbia
District Department of the Environment
District Dept. of the Environment - Contacts
Metropolitan Washington Council of Governments - Air Quality Forecast and Index
 
Data and Forecasts courtesy of:
Current Conditions
Air Quality Index (AQI)
observed at 22:00 EST
37
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
Ozone 37 Good
Particles (PM10) 7 Good
Particles (PM2.5) 22 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
25
Good
Health Message: None
Air Quality Index (AQI)
25
Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5)
25
Good
Particles (PM2.5)
25
Good
Forecast Discussion: Good air quality is expected through the weekend and into early next week. Breezy conditions with favorable transport Saturday and Sunday will keep clean Canadian air in the region, resulting in Good air quality. Winds will switch southerly by Monday, and transport from the south will increase both temperatures and humidity. Good air quality is still currently expected with modest but persistent winds Monday and an upstream airmass generally anticipated to have light concentrations of fine particulates. The warm southerly flow continues Tuesday, but will be associated with intermittent periods of rain. Good air quality will persist as a result of steady southerly winds. Similar conditions are expected Wednesday. -MDE
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