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 20 Jan 2025: Coronel Fabriciano 13.7 µg/m³, Timóteo 12.6 µg/m³ and Dias d'Ávila 11.2 µg/m³.
- 1Coronel FabricianoMinas Gerais13.7
- 2TimóteoMinas Gerais12.6
- 3Dias d'ÁvilaBahia11.2
- 4SerraEspírito Santo11.1
- 5Rio ClaroSão Paulo10.9
- 6IbiritéMinas Gerais10.5
- 7SantosSão Paulo9.4
- 8ItabiraMinas Gerais8.8
- 9Ferraz de VasconcelosSão Paulo8.7
- 10CamaçariBahia8.7
- 11São PauloSão Paulo8.6
- 12Santo AndréSão Paulo8.6
- 13LimeiraSão Paulo8.3
- 14Rio de JaneiroRio de Janeiro7.5
- 15CampinasSão Paulo7.5
- 16ItaquaquecetubaSão Paulo7.3
- 17Ribeirão PretoSão Paulo7.1
- 18CongonhasMinas Gerais7.1
- 19Conceição do Mato DentroMinas Gerais7.1
- 20BauruSão Paulo6.8
+ 6 more cities, the next at 6.7 µg/m³
Not counted on this day, too few days measured: Presidente Prudente since 17 Jan 2025, Nova União since 10 Jan 2025, Ipatinga since 10 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, Turkey and Iran, which publish only on their own websites. We are building the reader for China's network. The networks of Turkey and Iran don't answer requests from outside their countries, so we can't read them. Most cities there are missing from this board, not clean. Why.