SmogRank / History / City race
Cities, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities for PM2.5 over the 7 days to 22 Jul 2024: Fort McMurray 128.1 µg/m³, Fort St. John 125.7 µg/m³ and Kinshasa 123.6 µg/m³.
- 1Fort McMurrayCanada128.1
- 2Fort St. JohnCanada125.7
- 3KinshasaDemocratic Republic of the Congo123.6
- 4Grand CentreCanada97.2
- 5OsornoChile88.5
- 6NacimientoChile88.1
- 7CoyhaiqueChile83.5
- 8Prince AlbertCanada78.2
- 9TemucoChile74.7
- 10HualpénChile71.8
- 11ChillánChile71.4
- 12RancaguaChile71.3
- 13TalcaChile68.5
- 14Puerto VarasChile67.9
- 15CuricóChile67.3
- 16RengoChile67.2
- 17HualquiChile66.9
- 18LahorePakistan65.8
- 19CuranilahueChile65.6
- 20CoronelChile64.7
+ 2,628 more cities, 62.2 µg/m³ and below
Not counted on this day, too few days measured: Peshawar since 20 Jul 2024, Shenyang since 18 Jul 2024, Guadalajara since 12 Jun 2024 and 2 more cities.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.