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 6 Dec 2025: Guarapari 27.0 µg/m³, Anchieta 25.9 µg/m³ and Nova União 22.1 µg/m³.
- 1GuarapariEspírito Santo27.0
- 2AnchietaEspírito Santo25.9
- 3Nova UniãoMinas Gerais22.1
- 4São LuísMaranhão17.6
- 5JundiaíSão Paulo13.5
- 6Rio ClaroSão Paulo13.0
- 7GuarapuavaParaná12.6
- 8CampinasSão Paulo12.6
- 9TubarãoSanta Catarina12.4
- 10BetimMinas Gerais12.3
- 11AraucáriaParaná12.3
- 12Ferraz de VasconcelosSão Paulo12.1
- 13Coronel FabricianoMinas Gerais12.1
- 14TimóteoMinas Gerais11.9
- 15São PauloSão Paulo11.9
- 16PaulíniaSão Paulo11.9
- 17São José do Rio PretoSão Paulo11.6
- 18Santo AndréSão Paulo11.2
- 19ItaquaquecetubaSão Paulo11.2
- 20LimeiraSão Paulo11.0
+ 21 more cities, the next at 10.9 µg/m³
Not counted on this day, too few days measured: Bauru since 4 Dec 2025, Londrina since 29 Nov 2025, Guaratinguetá since 27 Nov 2025 and 5 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.