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 11 Dec 2024: São Luís 22.8 µg/m³, Coronel Fabriciano 17.2 µg/m³ and Timóteo 13.2 µg/m³.
- 1São LuísMaranhão22.8
- 2Coronel FabricianoMinas Gerais17.2
- 3TimóteoMinas Gerais13.2
- 4Dias d'ÁvilaBahia12.5
- 5ItaquaquecetubaSão Paulo12.2
- 6Rio ClaroSão Paulo12.1
- 7SerraEspírito Santo11.5
- 8CampinasSão Paulo10.9
- 9Santo AndréSão Paulo10.8
- 10São PauloSão Paulo10.5
- 11LimeiraSão Paulo10.5
- 12Ferraz de VasconcelosSão Paulo10.4
- 13JundiaíSão Paulo10.3
- 14ItabiraMinas Gerais10.2
- 15CubatãoSão Paulo9.6
- 16São José do Rio PretoSão Paulo9.2
- 17Ribeirão PretoSão Paulo9.2
- 18PiracicabaSão Paulo8.9
- 19Nova UniãoMinas Gerais8.8
- 20SantosSão Paulo8.8
+ 13 more cities, the next at 8.6 µg/m³
Not counted on this day, too few days measured: Curitiba since 9 Dec 2024, Araucária since 9 Dec 2024, Paranaguá since 8 Dec 2024 and 12 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.