The darker the orange colour, the worse the air quality in that area. That makes sense, considering traffic emissions degrade air quality, and knowing that the northeast is home to many industrial emitters and a major airport. In the meantime, they've shared their findings with Alberta Health Services and the Calgary Region Airshed Zone, which monitors, analyzes and provides information on air quality and develops strategies to manage air quality issues within the city. Overall air quality still safeThe air pollution levels are all relative, so Calgarians shouldn't be too concerned about any health impacts, Shahid said. The city's worst air quality would correspond to the low end of "moderate risk" on Environment Canada's Air Quality Health Index, he said.

Source: CBC News February 22, 2018 22:52 UTC