SmogRank / World / Europe / Czechia / Olomouc Region
Most polluted cities in Olomouc Region, Czechia
No city in Olomouc Region, Czechia has enough readings to rank for the last 30 days.
47 monitors in Czechia stopped reporting on 6 Oct, 12:00 local time. Cities that rely on them are missing from the 24-hour board and may drop from the longer ones; that isn't clean air, and they return when the data does.
A city joins this ranking with enough days of readings over the last 30 days; none here has that right now, so there is nothing to map or chart.
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
Estimated: cities without a monitor
Olomouc Region cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Prostějov | ≈ 16 µg/m³ |
| Šumperk | ≈ 14 µg/m³ |
Bad-air episodes in Olomouc Region
- Europe, January and February 202612 January to 12 February 2026, 32 days625 cities252 µg/m³peak, Travnik
- Europe, 8 to 10 November 20253 days84 cities93 µg/m³peak, Żywiec
- Europe, March 202519 to 30 March 2025, 12 days401 cities83 µg/m³peak, Kikinda
- Germany, Poland and 25 more countries, March 20253 to 13 March 2025, 11 days553 cities152 µg/m³peak, Negotin
- Europe, 14 February to 1 March 202516 days619 cities178 µg/m³peak, Krotoszyn
- Europe, 1 to 14 February 202514 days628 cities179 µg/m³peak, Banja Luka
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
Updated 2026-10-07 03:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.