SmogRank / World / Belgium / Flanders / February 2023
Most polluted cities in Flanders, Belgium, February 2023
19 cities in Flanders, Belgium ranked by their average PM2.5 over the 28 days. Worst: Menen at 20.4 µg/m³, #126 of 1,088 cities in the world. Cleanest: Hasselt at 14.4. A city needs measurements on 70% of the days to be ranked.
OpenAQ's archive, where our readings come from, has almost none for 25 of these 28 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; many cities elsewhere are missing from this board, not clean. Why.
About 84.1K people in these 4 cities breathed unhealthy air on an average day of February 2023.
Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.
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
All cities in the world, February 2023 · All cities in Belgium, February 2023 · Flanders now
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SmogRank, most polluted cities in Flanders, Belgium, PM2.5, February 2023, smogrank.com/be/region/flanders/history/2023-02 (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.