Niederkassel vs Rösrath: PM2.5 compared

Niederkassel and Rösrath were both measured on only one day over the last year, too few to compare them (it takes 30).

Right now

Niederkassel#2,006on the 24-hour board of 2,686, at 22 US AQI (3.9 µg/m³)

Rösrath#2,146on the 24-hour board of 2,686, at 19 US AQI (3.4 µg/m³)

Compare either city with another

Niederkassel

Side by side with Bonn (the nearest), Augsburg (Germany's worst on 30 days), Gujranwala (the world's worst on 30 days).

Rösrath

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 05:07 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).