SmogRank / History / City race
Cities in Germany, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Germany for PM2.5 over the 30 days to 23 May 2023: Krefeld 14.5 µg/m³, Niederzier 12.4 µg/m³ and Duisburg 12.1 µg/m³.
- 1KrefeldNorth Rhine-Westphalia14.5
- 2NiederzierNorth Rhine-Westphalia12.4
- 3DuisburgNorth Rhine-Westphalia12.1
- 4JülichNorth Rhine-Westphalia12.0
- 5DattelnNorth Rhine-Westphalia11.6
- 6MahlowBrandenburg11.5
- 7EssenNorth Rhine-Westphalia11.5
- 8DüsseldorfNorth Rhine-Westphalia11.1
- 9TeltowBrandenburg11.0
- 10GelsenkirchenNorth Rhine-Westphalia11.0
- 11AachenNorth Rhine-Westphalia11.0
- 12SolingenNorth Rhine-Westphalia10.9
- 13WeidenBavaria10.7
- 14Halle (Saale)Saxony-Anhalt10.7
- 15TitzNorth Rhine-Westphalia10.6
- 16OberhausenNorth Rhine-Westphalia10.6
- 17GreizThuringia10.6
- 18MühlhausenThuringia10.5
- 19KölnNorth Rhine-Westphalia10.5
- 20KoblenzRheinland-Pfalz10.5
+ 165 more cities, 10.5 µg/m³ and below
Not counted on this day, too few days measured: Neuwied since 30 Mar 2023, Luckenwalde since 30 Mar 2023, Kempten (Allgäu) since 30 Mar 2023 and 9 more cities. Days missing from the source archive fall in this window, so fewer countries are counted.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.