SmogRank / World / Germany / North Rhine-Westphalia / December 2023
Most polluted cities in North Rhine-Westphalia, Germany, December 2023
31 cities in North Rhine-Westphalia, Germany ranked by their average PM2.5 over the 31 days. Worst: Borken at 9.9 µg/m³, #702 of 2,197 cities in the world. Cleanest: Netphen at 4.0. 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.
- 1Borken 0%
- 2Datteln 0%
- 3Gelsenkirchen 0%
- 4Münster 0%
- 5Unna 0%
- 5Krefeld 0%
- 7Duisburg 0%
- 8Oberhausen 0%
- 9Düsseldorf 0%
- 9Bottrop 0%
- 11Hagen 0%
- 12Wuppertal 0%
- 13Dortmund 0%
- 13Bielefeld 0%
- 15Bergheim 0%
- 16Ratingen 0%
- 17Kaldenkirchen 0%
- 18Köln 0%
- 19Essen 0%
- 20Leverkusen 0%
- 21Lüdenscheid 0%
- 21Hattingen 0%
- 23Titz 0%
- 23Niederzier 0%
- 25Mönchengladbach 0%
- 25Bonn 0%
- 27Schwerte 0%
- 28Aachen 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, December 2023, smogrank.com/de/region/north-rhine-westphalia/history/2023-12 (accessed 7 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.