SmogRank / World / Poland / Silesia / March 2023
Most polluted cities in Silesia, Poland, March 2023
7 cities in Silesia, Poland ranked by their average PM2.5 over the 31 days. Worst: Jastrzębie Zdrój at 23.9 µg/m³, #8 of 867 cities in the world. Cleanest: Cieszyn at 17.0. A city needs measurements on 70% of the days to be ranked.
OpenAQ's archive, where our readings come from, has almost none for 20 of these 31 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.
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.
- 1Wodzisław Śląski 20%
- 2Jastrzębie Zdrój 19%
- 3Racibórz 16%
- 4Bielsko-Biala 14%
- 5Czechowice-Dziedzice 12%
- 6Katowice 10%
- 7Cieszyn 10%
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, March 2023 · All cities in Poland, March 2023 · Silesia now
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SmogRank, most polluted cities in Silesia, Poland, PM2.5, March 2023, smogrank.com/pl/region/silesia/history/2023-03 (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.