SmogRank / History / City race

Cities in Peru, 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 30 days to18 Jul 2024 That day's board

The worst cities in Peru for PM2.5 over the 30 days to 18 Jul 2024: Santa María 97.1 µg/m³, Santa Anita - Los Ficus 48.9 µg/m³ and Lima 45.8 µg/m³.

  1. 1Santa MaríaLima region97.1
  2. 2Santa Anita - Los FicusLima region48.9
  3. 3LimaLima Province45.8
  4. 4San Francisco De BorjaLima region36.9
  5. 5CallaoCallao31.7
  6. 6Jacobo HunterArequipa26.0
  7. 7Horacio Zeballos GamezArequipa26.0
  8. 8ChocopeLa Libertad19.7
  9. 9YauriCuzco Department19.4
  10. 10Villa Poeta José Gálvez BarrenecheaLima region19.4
  11. 11AscopeLa Libertad19.1
  12. 12TinyahuarcoPasco16.0
  13. 13ChimboteAncash15.6
  14. 14La HuacaPiura10.8
  15. 15YanacanchaPasco10.1

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.