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 13 Jun 2025: Santa Anita - Los Ficus 74.3 µg/m³, Lima 36.7 µg/m³ and San Francisco De Borja 31.5 µg/m³.
- 1Santa Anita - Los FicusLima region74.3
- 2LimaLima Province36.7
- 3San Francisco De BorjaLima region31.5
- 4CallaoCallao25.5
Not counted on this day, too few days measured: Santa María since 3 May 2025 and Villa Poeta José Gálvez Barrenechea since 3 May 2025.
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.