Bad-air episodes in Chile
11 times since January 2023, many cities in Chile had air at least twice as dirty as their usual for the time of year on the same days. The largest reached 19 cities: South-western Chile, July 2026.
2026
- South-western Chile, August 202622 to 24 August 2026, 3 days14 cities169Osorno
- South-western Chile, August 202613 August 2026, 1 day10 cities162Osorno
- South-western Chile, July 20262 to 8 July 2026, 7 days19 cities347Osorno
- South-western Chile, May 202625 to 27 May 2026, 3 days14 cities165Linares
- South-western Chile, May 202618 to 22 May 2026, 5 days19 cities192Hualpén
- Los Lagos Region and Biobio, Chile, May 20262 to 3 May 2026, 2 days8 cities132Puerto Varas
- Biobio and Maule Region, Chile, January 202619 to 21 January 2026, 3 days10 cities102Los Ángeles
2025
- South-western Chile, August 20259 August 2025, 1 day9 cities187Puerto Varas
- South-western Chile, June and July 202529 June to 4 July 2025, 6 days17 cities291Osorno
- South-western Chile, June 20259 to 11 June 2025, 3 days12 cities202Los Ángeles
- Southern Chile, June 20252 to 4 June 2025, 3 days9 cities139San Carlos
Each row: one bar per day, as tall as the number of cities counted that day and coloured by their median level; the number of cities; the highest daily reading and where. An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes.