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 9:00 EDT
43
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 43 Good
Particles (PM10) 23 Good
Particles (PM2.5) 32 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
50
Good
Health Message: None
Air Quality Index (AQI)
54
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
50
Good
Particles (PM2.5)
33
Good
Ozone
54
Moderate
Particles (PM2.5)
42
Good
Forecast Discussion: Winds will be a bit breezy out of the northwest Friday behind a passing frontal system. Despite ample sunshine, cleaner air and plentiful surface mixing will keep ozone levels fairly clean. Good air quality is expected across the state. High pressure will quickly move overhead and off the Mid-Atlantic coast Saturday. Weak recirculating winds along with continued sunshine will bring ozone levels up to threshold Good to low Moderate. High pressure will persist off the Atlantic coast Sunday. Temperatures and dew points will quickly rise under southwest flow. Look for ozone levels to climb into the Moderate range across the state. –MDE
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