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 10 Jan 2025: Coronel Fabriciano 15.7 µg/m³, Timóteo 12.2 µg/m³ and Serra 12.1 µg/m³.
- 1Coronel FabricianoMinas Gerais15.7
- 2TimóteoMinas Gerais12.2
- 3SerraEspírito Santo12.1
- 4Dias d'ÁvilaBahia11.6
- 5Rio ClaroSão Paulo10.1
- 6São PauloSão Paulo9.3
- 7Santo AndréSão Paulo9.3
- 8Ferraz de VasconcelosSão Paulo9.2
- 9SantosSão Paulo8.9
- 10ItabiraMinas Gerais8.5
- 11LimeiraSão Paulo8.4
- 12CamaçariBahia8.2
- 13ItaquaquecetubaSão Paulo8.0
- 14CampinasSão Paulo8.0
- 15Ribeirão PretoSão Paulo7.3
- 16Presidente PrudenteSão Paulo7.2
- 17Conceição do Mato DentroMinas Gerais7.2
- 18BauruSão Paulo7.1
- 19São José do Rio PretoSão Paulo7.0
- 20PiracicabaSão Paulo6.8
+ 6 more cities, the next at 6.7 µg/m³
Not counted on this day, too few days measured: Nova União since 10 Jan 2025, Ipatinga since 10 Jan 2025, São Luís since 7 Jan 2025 and 16 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.