Alfeld vs Hildesheim: PM2.5 compared

Alfeld and Hildesheim were both measured on only 0 days over the last year, too few to compare them (it takes 30).

Right now

Alfeld#2,561on the 24-hour board of 2,645, at 11 US AQI (1.9 µg/m³)

Hildesheim–no readings since 11 Oct

Compare either city with another

Alfeld

Side by side with Mahlow (Germany's worst on 30 days), Kasur (the world's worst on 30 days).

Hildesheim

Side by side with Sarstedt (the nearest), Mahlow (Germany's worst on 30 days), Kasur (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 2026-10-14 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).