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 10 Nov 2025: Santa María 56.0 µg/m³, Santa Anita - Los Ficus 31.7 µg/m³ and Villa Poeta José Gálvez Barrenechea 28.7 µg/m³.
- 1Santa MaríaLima region56.0
- 2Santa Anita - Los FicusLima region31.7
- 3Villa Poeta José Gálvez BarrenecheaLima region28.7
- 4LimaLima Province28.4
- 5San Francisco De BorjaLima region24.9
- 6CallaoCallao22.8
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.