Environment Canada and Ontario’s Ministry of Environment issued a special air quality statement for parts of southern Ontario Thursday, warning of higher-than-normal levels of air pollution from Hamilton to the GTA.
Light winds combined with stagnate air mass has led to elevated levels of nitrogen dioxide in the air.
The Air Quality Health Index, which measures air pollution levels across the country, has registered values of seven to nine, in Hamilton, Halton, Peel and Toronto. Low to moderate levels generally fall between one and six.
The national weather agency says as winds pick up later Thursday the affected municipalities should see more moderate air-quality values, however there is a risk it will spike again around 7 p.m.
Those who are vulnerable to air pollution, including those with respiratory conditions, are urged to consider reducing or rescheduling strenuous activities outdoors. Young children, the elderly and those who are active outdoors may also be sensitive to the effects of air pollution and should limit their exposure.
