2025 was Canada’s second-worst wildfire season on record. Canada’s air quality was worse than the United States in 2025, thanks to a record-breaking wildfire season last summer, according to a new report by IQAir. Canada doesn’t have the worst air quality in North America: That designation goes to Mexico, which landed at 50 on IQAir’s 2025 list of most polluted countries and regions. Wildfires pushed Canada to 117 in 2025, with the United States taking the 120th spot. These wildfires not only made Canada more polluted than the United States, but they were also large enough to affect air quality in Europe as smoke crossed the Atlantic Ocean. Between May 2025 and November 2025, Canada experienced its second-worst wildfire season ever, with over 6,000 wildfires and 8.3 million hectares burnt across the country. …Health Canada estimates that air pollution contributes to 15,300 premature deaths each year in Canada.