SmogRank / Countries / Czechia / April 2026
Most polluted cities in Czechia, April 2026
2 cities in Czechia ranked by their average PM2.5 over the 30 days. Worst: Říčany at 14.5 µg/m³, #322 of 2,277 cities in the world. Cleanest: Stodůlky at 13.9. 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, April 2026 · Czechia now
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SmogRank, most polluted cities in Czechia, PM2.5, April 2026, smogrank.com/cz/history/2026-04 (accessed 2 Oct 2026).
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