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 15 Dec 2024: Santa María 58.7 µg/m³, Jacobo Hunter 27.8 µg/m³ and Horacio Zeballos Gamez 27.8 µg/m³.
- 1Santa MaríaLima region58.7
- 2Jacobo HunterArequipa27.8
- 3Horacio Zeballos GamezArequipa27.8
- 4LimaLima Province25.9
- 5ChocopeLa Libertad20.2
- 6San Francisco De BorjaLima region19.8
- 7Villa Poeta José Gálvez BarrenecheaLima region19.7
- 8Santa Anita - Los FicusLima region19.5
- 9AscopeLa Libertad15.4
- 10CallaoCallao15.1
- 11ChimboteAncash14.8
- 12YauriCuzco Department9.8
- 13La HuacaPiura9.1
- 14TinyahuarcoPasco6.6
- 15YanacanchaPasco6.3
Not counted on this day, too few days measured: Tupac Amaru since 22 Nov 2024 and San Clemente since 22 Nov 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.