Health

Air Quality Index

Ashburn, VA 20146

Air Quality

Today's Air Quality - Northern Virginia, VA
Date	Code	AQI Level	Major Pollutant
Air Quality Forecast - Northern Virginia, VA
Date	Code	AQI Level	Major Pollutant
5/31/2012		45	Ozone
5/31/2012		32	Small Particulate Matter
6/1/2012		47	Ozone
6/1/2012		39	Small Particulate Matter
6/2/2012		47	Ozone
6/2/2012		45	Small Particulate Matter

Air Quality Index (AQI) Scale
AQI Color	AQI Category	AQI Numbers
	Good	0-50
	Moderate	51-100
	Unhealthy for Sensitive Groups	101-150
	Unhealthy	151-200
	Very Unhealthy	201-300
	Hazardous	301-500+

High Temps

Find out the high temps for your area.
View Temp Map

Hourly Forecast for Ashburn, VA 20146

Time	Conditions	Sky Cover	Chance of Precip.	Heat Index Wind Chill	Wind
Wednesday, May 30, 2012
12 pm	81° F	71%	15%	83° F	From WNW 1 mph
1 pm	83° F	66%	15%	84° F	From WSW 2 mph
View Next 12 Hours

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What is AQI?

The AQI is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health concerns you should be aware of. The AQI focuses on health effects that can happen within a few hours or days after breathing polluted air. EPA uses the AQI for five major air pollutants regulated by the Clean Air Act: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide. For each of these pollutants, EPA has established national air quality standards to protect against harmful health. (EPA-454K-03-002, August 2003, http://www.airnow.gov/)