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 9 Jan 2026: Santa María 41.9 µg/m³, Santa Anita - Los Ficus 31.7 µg/m³ and Lima 29.9 µg/m³.
- 1Santa MaríaLima region41.9
- 2Santa Anita - Los FicusLima region31.7
- 3LimaLima Province29.9
- 4San Francisco De BorjaLima region23.8
- 5CallaoCallao22.2
- 6Villa Poeta José Gálvez BarrenecheaLima region21.5
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.