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 14 Jan 2025: Santa María 44.4 µg/m³, Jacobo Hunter 26.7 µg/m³ and Horacio Zeballos Gamez 26.7 µg/m³.
- 1Santa MaríaLima region44.4
- 2Jacobo HunterArequipa26.7
- 3Horacio Zeballos GamezArequipa26.7
- 4LimaLima Province18.5
- 5ChocopeLa Libertad18.0
- 6Tupac AmaruIca17.7
- 7San ClementeIca17.7
- 8PiscoIca16.8
- 9Santa Anita - Los FicusLima region16.6
- 10San Francisco De BorjaLima region15.1
- 11AscopeLa Libertad14.2
- 12CallaoCallao12.1
- 13Villa Poeta José Gálvez BarrenecheaLima region11.2
- 14YauriCuzco Department10.2
- 15La HuacaPiura7.8
- 16YanacanchaPasco6.1
- 17TinyahuarcoPasco5.3
Not counted on this day, too few days measured: Chimbote since 29 Dec 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.