Air Quality Advisory in Effect for P.G.
By 250 News
Thursday, April 15, 2010 04:25 PM
Prince George, B.C.- The Ministry of Environment in collaboration with the Northern Health Authority has issued an Air Quality Advisory for Prince George due to high concentrations of fine particulate matter.
· The provincial air quality objective for coarse particles, PM10, is 50 micrograms per cubic metre, averaged over 24 hours. The 24 hour PM10 rolling average was 55 µg/m3 at the Plaza 400 downtown, 70 µg/m3 at BCR and 23µg/m3 at College Heights at noon today.
· The provincial air quality objective for fine particles, PM2.5, is 25 micrograms per cubic metre, averaged over 24 hours. The 24 hour PM2.5 rolling average was 11 µg/m3 at the Plaza 400 downtown site at noon and 8 µg/m3 at College Heights.
· Based on the air quality data, the high levels are mainly due to road dust, as well as emissions from industry and transportation sources such as automobiles, trucks and rail traffic.
· An upper high pressure ridge has brought stagnant conditions over the region resulting in pollutants accumulating in the air shed. This ridge will slowly move eastward in the next 24-hours.
· This episode is expected to continue at least until tomorrow morning.
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