SmogRank / Countries / Czechia / 2026

Most polluted cities in Czechia, 2026

2 cities in Czechia ranked by their average PM2.5 so far (273 of 365 days); 2 above the WHO annual guideline (5.0 µg/m³). Worst: Stodůlky at 16.2 µg/m³, #292 of 2,181 cities in the world. Cleanest: Říčany at 15.7. A city needs measurements on 70% of the days to be ranked.

  1. 1Stodůlkylow-cost sensorsPrague
    16.23.2×
  2. 2Říčanylow-cost sensorsCentral Bohemia
    15.73.1×
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, 2026 · Czechia now