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 17:00 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
Ozone 34 Good
Particles (PM10) 15 Good
Particles (PM2.5) 32 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
53
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Air Quality Index (AQI)
46
Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5)
53
Moderate
Particles (PM2.5)
46
Good
Forecast Discussion: Unseasonable warmth continues on Wednesday with increasing clouds and gusty winds ahead of an approaching cold front. Good dispersion on long southerly trajectories should keep the region in Good air quality. On Thursday a cold front stalls across the region. Much of Maryland will be on the cold side of the front, creating cooler, inverted conditions. While copious rain is anticipated, the inverted conditions may still give rise to slightly degraded air quality, warranting a Moderate AQI forecast for the I-95 corridor at the moment. Continued inverted conditions on Friday with relatively short trajectories may continue Moderate fine particle air quality for areas west of the Bay as easterly onshore winds clean the region from east to west. –MDE
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