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 14 Jun 2024: Ferraz de Vasconcelos 20.2 µg/m³, Santo André 19.1 µg/m³ and Campinas 18.9 µg/m³.
- 1Ferraz de VasconcelosSão Paulo20.2
- 2Santo AndréSão Paulo19.1
- 3CampinasSão Paulo18.9
- 4ItaquaquecetubaSão Paulo18.8
- 5São José do Rio PretoSão Paulo18.7
- 6São PauloSão Paulo18.4
- 7LimeiraSão Paulo18.1
- 8CuritibaParaná17.8
- 9Ribeirão PretoSão Paulo17.6
- 10Rio de JaneiroRio de Janeiro16.5
- 11JundiaíSão Paulo16.4
- 12PaulíniaSão Paulo16.1
- 13ParacatuMinas Gerais16.0
- 14AraucáriaParaná15.9
- 15PiracicabaSão Paulo14.8
- 16ItabiraMinas Gerais14.8
- 17CongonhasMinas Gerais14.5
- 18SantosSão Paulo13.9
- 19TaubatéSão Paulo13.8
- 20São José dos CamposSão Paulo13.7
+ 12 more cities, the next at 13.5 µg/m³
Not counted on this day, too few days measured: São Luís since 2 Jun 2024, Rio Claro since 24 May 2024, Guaratinguetá since 16 May 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 and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.