SmogRank / Bonn / Königswinter
Bonn vs Königswinter: PM2.5 compared
Bonn and Königswinter were both measured on only 0 days over the last year, too few to compare them (it takes 30).
Right now
Bonn–no readings since 11 Oct
Königswinter#1,831on the 24-hour board of 2,504, at 22 US AQI (3.9 µg/m³)
Compare either city with another
Bonn
Side by side with Augsburg (Germany's worst on 30 days), Gujranwala (the world's worst on 30 days).
Königswinter
Side by side with Augsburg (Germany's worst on 30 days), Gujranwala (the world's worst on 30 days).
The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.
Updated 2026-10-13 03:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence).