SmogRank / Countries / Czechia / September 2026
Most polluted cities in Czechia, September 2026
2 cities in Czechia ranked by their average PM2.5 over the 30 days. Worst: Stodůlky at 4.1 µg/m³, #2,105 of 2,330 cities in the world. Cleanest: Říčany at 4.0. A city needs measurements on 70% of the days to be ranked.
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+
All cities in the world, September 2026 · Czechia now
Use this board
SmogRank, most polluted cities in Czechia, PM2.5, September 2026, smogrank.com/cz/history/2026-09 (accessed 2 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.