SmogRank / History / City race

Cities, 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.

CountriesCities
The 7 days to6 Jul 2026 That day's board

The worst cities for PM2.5 over the 7 days to 6 Jul 2026: Coyhaique 228.0 µg/m³, Osorno 186.5 µg/m³ and Puerto Varas 174.9 µg/m³.

  1. 1CoyhaiqueChile228.0
  2. 2OsornoChile186.5
  3. 3Puerto VarasChile174.9
  4. 4PanipatIndia138.8
  5. 5La UniónChile119.2
  6. 6LinaresChile113.3
  7. 7GurugramIndia110.8
  8. 8Los ÁngelesChile103.4
  9. 9CuranilahueChile100.6
  10. 10KarnālIndia98.3
  11. 11ValdiviaChile97.9
  12. 12NacimientoChile92.1
  13. 13Puerto MonttChile86.1
  14. 14ChillánChile86.0
  15. 15TemucoChile85.9
  16. 16San CarlosChile85.4
  17. 17KinshasaDemocratic Republic of the Congo84.7
  18. 18CuricóChile83.9
  19. 19BahadurgarhIndia82.7
  20. 20VillarricaChile82.2

+ 2,937 more cities, 81.3 µg/m³ and below

Not counted on this day, too few days measured: Buxar since 6 Jul 2026, Hualpén since 5 Jul 2026, Sonīpat since 25 Jun 2026 and 2 more cities.

30 days7 days
GoodModerateSensitive groupsUnhealthyVery unhealthyHazardousWHO 24-hour guideline, 15 µg/m³Fades where it stood: not counted that 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 readers for them. Most cities there are missing from this board, not clean. Why.