Monthly charts displaying daily
Air Quality Index (AQI)
for PM 2.5 and Ozone for the
Roanoke Valley
Round Hill Montessori PM 2.5 monitor & East
Vinton Elementary School Ozone monitor
AQI
Matrix - Air Quality Index color
coded and defined for values for PM 2.5
and Ozone pollutants.
2008
January | February | March | April | May | June | July
2007
January | February | March | April | May | June | July | August | September | October | November | December
2006
January | February | March | April | May | June | July | August | September | October | November | December
2005
May | June | July | August | September
| October
| November
| December
Beginning in 2008, the charts reflect the new 2008 ozone standard. 2005 - 2007 charts reflect the old 1997 ozone standard.
Beginning in 2007, the charts reflect the new Dec. 17, 2006 PM 2.5 standard. 2005 - 2006 charts reflect the old PM 2.5 standard.
- All charts compiled from VA DEQ website
data. Monitor data is not official until quality assured
by VA DEQ.
- A gap in a chart indicates incomplete website data.
- Ozone data available from April/May -
September.
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