Ashburn, United States Nearest Air Quality monitoring stations

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Ashburn - Broad Run High School, Northern Virginia17 - Long Park - Haymarket, Northern Virginia11 - Rockville, Maryland46 - Aurora Hills Visitor Center, Northern Virginia19 - Lee District Park - Fairfax County, Northern Virginia55 - HU-Beltsville, Maryland76 - Frederick Co. Public School Maint. Dept., Winchester38 - Hagerstown, Maryland34 -

About the Air Quality and Pollution Measurement:

The pollution indices and color codes available on this web site follow the EPA graduation, as defined by AirNow and explained in wikipedia.

AQIAir Pollution LevelHealth Implications
0 - 50GoodAir quality is considered satisfactory, and air pollution poses little or no risk
51 -100ModerateAir 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.
101-150Unhealthy for Sensitive GroupsMembers of sensitive groups may experience health effects. The general public is not likely to be affected.
151-200UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effects
201-300Very UnhealthyHealth warnings of emergency conditions. The entire population is more likely to be affected.
300+HazardousHealth alert: everyone may experience more serious health effects

To know more about Air Quality and Pollution, check the wikipedia Air Quality topic or the airnow guide to Air Quality and Your Health.

For very useful health advices of Beijing Doctor Richard Saint Cyr MD, check blog.