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 Sep 2024: Santa María 78.3 µg/m³, Santa Anita - Los Ficus 33.5 µg/m³ and Tinyahuarco 30.6 µg/m³.
- 1Santa MaríaLima region78.3
- 2Santa Anita - Los FicusLima region33.5
- 3TinyahuarcoPasco30.6
- 4San Francisco De BorjaLima region29.7
- 5Jacobo HunterArequipa26.4
- 6Horacio Zeballos GamezArequipa26.4
- 7Villa Poeta José Gálvez BarrenecheaLima region25.8
- 8LimaLima Province23.2
- 9YauriCuzco Department21.8
- 10ChocopeLa Libertad18.4
- 11AscopeLa Libertad16.3
- 12ChimboteAncash13.6
- 13La HuacaPiura11.1
Not counted on this day, too few days measured: Callao since 6 Sep 2024, Tupac Amaru since 27 Aug 2024, San Clemente since 27 Aug 2024 and Yanacancha since 26 Jul 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.