Wildfire smoke blown in from south of the border blanketed Calgary on Wednesday.
Yesterday evening, Environment Canada rated the air quality as high risk. By 10 p.m. the rating dropped back down to moderate risk where it had been rated for most of the day.
Environment Canada’s forecast for Thursday’s air quality was five on a 10 point scale indicating moderate risk. At 10 a.m. the risk was at three – or low risk.
According to the Calgary Regional Airshed Zone, Calgary had 434 hours of moderate air quality risk from July 1 to Sept. 30. It also had 77 hours of high risk and zero hours of very high risk. The vast majority of hours were low risk.