SmogRank / Episodes / Switzerland / 2024
Bad-air episodes in Switzerland, 2024
In 2024 there were 8 episodes in Switzerland: times when many cities there had air at least twice as dirty as their usual for the time of year on the same days. The largest reached 519 cities: Europe, 8 to 27 January 2024.
20 days. 519 cities; highest daily mean 244 µg/m³ in Czechowice-Dziedzice.
Each bar is an episode: as long as it lasted, as thick as the number of cities it counted, coloured by its highest daily mean. A lane is a part of the world; an episode sits in the lane of the country with most of its cities. Point at a bar or tap one to read it; the years open each year's list.
2024
- Europe, 12 to 14 December 20243 days90 cities57 µg/m³peak, Sallanches
- Europe, November 20243 to 13 November 2024, 11 days365 cities180 µg/m³peak, Negotin
- Europe, March and April 202429 March to 2 April 2024, 5 days282 cities151 µg/m³peak, Malchow
- Europe, February and March 202428 February to 10 March 2024, 12 days303 cities90 µg/m³peak, Otwock
- Italy, Switzerland and France, February 202415 to 22 February 2024, 8 days33 cities97 µg/m³peak, Vigevano
- Europe, 8 to 27 January 202420 days519 cities244 µg/m³peak, Czechowice-Dziedzice
- Italy, Switzerland and France, January 202424 to 26 January 2024, 3 days10 cities76 µg/m³peak, Capannori
- Western Europe, January 202414 to 16 January 2024, 3 days131 cities60 µg/m³peak, Manlleu
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.