In 2019 Toronto came in with a PM2.5 average of 7.4 μg/m³, putting into the World Health Organizations (WHO's) target bracket for the best quality of air, with closer to 0 being the most optimal in terms of air cleanliness and breathability. This is a respectable reading for such a largely populated city, one that places it (and Canada) into the upper echelons of least polluted cities and countries across the globe. Toronto’s 2019 reading of 7.4 μg/m³ placed it into 3652nd place out of all cities ranked worldwide, as well as 62nd place out of all cities ranked in Canada.
