CURATED PLAYLIST

Cleanest Air

Curated Playlists← Back to Cityle

Twelve cities with the lowest annual PM2.5 readings in the pool, from Quito at 2.1 µg/m³ up to Winnipeg at 5.5 µg/m³ — well below where most of this dataset’s 255 cities sit. Wind and geography help as much as policy does.

City 1 of 12

Urban Dossier

Clues 1/6

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Mean Annual Temp
15.6°C
Annual PM2.5Optimal (WHO)Top 2% of 255
2.1µg/m³
Good
Cryptic Clue

Second-highest capital city on Earth, behind only an Andean neighbor to the south, it sits close enough to the equator that a monument just north of downtown marks the line splitting the globe in half — though GPS surveys later found the true line missed that monument by a couple hundred meters.

01

Climate Baseline & Air Quality

Annual Rainfall
1,099.9mm/yr
ElevationHigh AltitudeTop 5% of 255
2,850m
Peak Smog Season
Dry-season (Jun-Sep) vehicle exhaust trapped in the narrow Andean valley
12-Month Annual Cycle
Baseline Temp (°C) Rain (mm)
0°30°0°168.2mm0mmJFMAMJJASOND