SmogRank / Countries / Czechia / January 2023

Most polluted cities in Czechia, January 2023

3 cities in Czechia ranked by their average PM2.5 over the 31 days. Worst: Ostrava at 17.7 µg/m³, #102 of 849 cities in the world. Cleanest: Brno at 13.3. A city needs measurements on 70% of the days to be ranked.

  1. 1OstravaMoravian-Silesian Region
    17.7
  2. 2Ústí nad LabemÚstí nad Labem Region
    14.7
  3. 3BrnoSouth Moravian
    13.3
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, January 2023 · Czechia now