SmogRank / History / City race
Cities in Brazil, 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 in Brazil for PM2.5 over the 30 days to 24 Jun 2024: Ferraz de Vasconcelos 25.3 µg/m³, Itaquaquecetuba 22.0 µg/m³ and Rio de Janeiro 21.6 µg/m³.
- 1Ferraz de VasconcelosSão Paulo25.3
- 2ItaquaquecetubaSão Paulo22.0
- 3Rio de JaneiroRio de Janeiro21.6
- 4São PauloSão Paulo21.5
- 5CuritibaParaná21.3
- 6Santo AndréSão Paulo19.4
- 7AraucáriaParaná19.1
- 8CampinasSão Paulo18.6
- 9Ribeirão PretoSão Paulo17.5
- 10SantosSão Paulo17.4
- 11LimeiraSão Paulo17.0
- 12JundiaíSão Paulo16.9
- 13PiracicabaSão Paulo15.9
- 14ParacatuMinas Gerais15.8
- 15PaulíniaSão Paulo15.5
- 16CongonhasMinas Gerais15.5
- 17São José dos CamposSão Paulo15.1
- 18ItabiraMinas Gerais15.0
- 19BetimMinas Gerais14.9
- 20TubarãoSanta Catarina14.6
+ 10 more cities, the next at 13.8 µg/m³
Not counted on this day, too few days measured: São José do Rio Preto since 20 Jun 2024, São Félix do Xingu since 15 Jun 2024, São Luís since 2 Jun 2024 and 4 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, 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.