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.
The worst cities in Peru for PM2.5 over the 30 days to 16 Oct 2024: Santa María 76.9 µg/m³, Jacobo Hunter 27.8 µg/m³ and Horacio Zeballos Gamez 27.8 µg/m³.
- 1Santa MaríaLima region76.9
- 2Jacobo HunterArequipa27.8
- 3Horacio Zeballos GamezArequipa27.8
- 4San Francisco De BorjaLima region26.3
- 5Santa Anita - Los FicusLima region25.9
- 6Villa Poeta José Gálvez BarrenecheaLima region23.8
- 7TinyahuarcoPasco23.2
- 8CallaoCallao21.9
- 9YanacanchaPasco21.2
- 10Tupac AmaruIca20.4
- 11San ClementeIca20.4
- 12ChocopeLa Libertad18.2
- 13YauriCuzco Department17.4
- 14AscopeLa Libertad16.3
- 15ChimboteAncash13.2
- 16La HuacaPiura9.8
Not counted on this day, too few days measured: Lima since 17 Sep 2024.
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 readers for them. Most cities there are missing from this board, not clean. Why.