Monthly Archives: July 2010

Roanoke Valley Has Two Code Orange Air Quality Days in August 2007

First exceedence of ozone standard since 2003 August 2007 – The hot, stagnant days of August produced two code orange air quality days for the Roanoke Valley. On August 5, the particulate matter 2.5 (PM 2.5) monitor in Roanoke reported … Continue reading

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Roanoke Valley Particulate Monitors Exceed Annual Health Standard in 2005

Feb. 23, 2006 – Two PM 2.5 monitors in the Roanoke Valley exceeded the EPA annual health standard during 2005. The Salem monitor, located at the Market Street Fire Station, had an annual arithmetic mean of 16.0 micrograms per cubic … Continue reading

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