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 20:00 EST
55
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
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 20 Good
Particles (PM10) 20 Good
Particles (PM2.5) 55 Moderate
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
55
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Air Quality Index (AQI)
55
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Particles (PM2.5)
55
Moderate
Particles (PM2.5)
55
Moderate
Forecast Discussion: An airmass laden with fine particle pollution upstream of Maryland will work its way into the state through the day on Tuesday. Fine particle concentrations will be on the rise as a result and Moderate AQI for particle pollution is a likely result for the daily average concentration. Peak particle concentrations as a result of the dirty air mass will likely occur overnight Tuesday into Wednesday morning, then generally starting to clear through the day on Wednesday. However, high morning concentrations Wednesday will again lead to Moderate AQI for particle pollution for the daily average on Wednesday. High pressure takes over for Thursday. Light winds typically exacerbate air quality under high pressure. However, in this situation, the dirtiest air associated with pollution from Tuesday and Wednesday may be removed from the region by Thursday morning, mitigating potential ongoing or worsening air quality issues. Never the less, a Moderate AQI forecast for fine particles will be maintained Thursday. Generally cleaner conditions and Good air quality arrive Friday and persist through the weekend. –MDE
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