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 16 Mar 2024: Campinas 12.2 µg/m³, Rio Claro 11.5 µg/m³ and Ferraz de Vasconcelos 11.5 µg/m³.
- 1CampinasSão Paulo12.2
- 2Rio ClaroSão Paulo11.5
- 3Ferraz de VasconcelosSão Paulo11.5
- 4São PauloSão Paulo11.3
- 5Santo AndréSão Paulo11.3
- 6SerraEspírito Santo11.0
- 7JundiaíSão Paulo10.8
- 8TubarãoSanta Catarina10.4
- 9SantosSão Paulo10.3
- 10VitóriaEspírito Santo10.0
- 11CongonhasMinas Gerais9.9
- 12Belo HorizonteMinas Gerais9.9
- 13AraucáriaParaná9.9
- 14PaulíniaSão Paulo9.6
- 15PiracicabaSão Paulo9.0
- 16Vila VelhaEspírito Santo8.6
- 17TaubatéSão Paulo8.5
- 18Ribeirão PretoSão Paulo8.4
- 19Duque de CaxiasRio de Janeiro8.3
- 20São José dos CamposSão Paulo8.2
+ 12 more cities, the next at 8.2 µg/m³
Not counted on this day, too few days measured: Itaquaquecetuba since 9 Mar 2024, Timóteo since 7 Mar 2024, Guaratinguetá since 6 Mar 2024 and 3 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.