SmogRank / World / Germany / North Rhine-Westphalia / January 2024
Most polluted cities in North Rhine-Westphalia, Germany, January 2024
31 cities in North Rhine-Westphalia, Germany ranked by their average PM2.5 over the 31 days. Worst: Krefeld at 14.6 µg/m³, #490 of 2,341 cities in the world. Cleanest: Netphen at 5.2. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Titz 4%
- 2Krefeld 3%
- 3Unna 3%
- 4Düsseldorf 3%
- 5Bergheim 3%
- 6Köln 3%
- 7Niederzier 3%
- 8Mönchengladbach 3%
- 9Datteln 0%
- 10Gelsenkirchen 0%
- 11Bottrop 0%
- 12Oberhausen 0%
- 13Hagen 0%
- 13Duisburg 0%
- 15Ratingen 0%
- 15Leverkusen 0%
- 15Dortmund 0%
- 18Wuppertal 0%
- 18Borken 0%
- 20Essen 0%
- 21Münster 0%
- 22Kaldenkirchen 0%
- 23Bielefeld 0%
- 24Hattingen 0%
- 25Lüdenscheid 0%
- 25Aachen 0%
- 27Schwerte 0%
- 27Bonn 0%
- 29Soest 0%
- 30Warstein 0%
- 31Netphen 0%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
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SmogRank, most polluted cities in North Rhine-Westphalia, Germany, PM2.5, January 2024, smogrank.com/de/region/north-rhine-westphalia/history/2024-01 (accessed 6 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.