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 21 Nov 2024: Delhi 351.4 µg/m³, Lahore 291.1 µg/m³ and Dhaka 154.7 µg/m³.
- 1DelhiIndia351.4
- 2LahorePakistan291.1
- 3DhakaBangladesh154.7
- 4KolkataIndia144.4
- 5Banja LukaBosnia and Herzegovina106.9
- 6HyderabadIndia93.2
- 7Novi PazarSerbia87.5
- 8PeshawarPakistan87.5
- 9IslamabadPakistan79.5
- 10N'DjamenaChad79.3
- 11KarachiPakistan79.2
- 12KampalaUganda78.4
- 13MumbaiIndia77.0
- 14NegotinSerbia76.6
- 15BaghdadIraq72.2
- 16UžiceSerbia70.4
- 17Ulan BatorMongolia69.7
- 18ValjevoSerbia69.1
- 19TravnikBosnia and Herzegovina63.6
- 20KinshasaDemocratic Republic of the Congo63.2
+ 2,526 more cities, the next at 61.2 µg/m³
Not counted on this day, too few days measured: Dushanbe since 17 Nov 2024, Shenyang since 20 Oct 2024, Manama since 18 Oct 2024 and Iloilo since 25 Sep 2024.
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, Turkey and Iran, which publish only on their own websites. We are building the reader for China's network. The networks of Turkey and Iran don't answer requests from outside their countries, so we can't read them. Most cities there are missing from this board, not clean. Why.