SmogRank / Episodes / Brazil / 2025
Bad-air episodes in Brazil, 2025
In 2025 there was one episode in Brazil: 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 11 cities: Southern Brazil, July 2025.
15 to 17 July 2025, 3 days. 11 cities; highest daily mean 45 µg/m³ in Rio Claro.
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.
2025
Episodes in 2024Each 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.