Beroun vs Kladno: PM2.5 compared
Over the last year, Beroun's air was 42% more polluted than Kladno's: PM2.5 averaged 17.7 µg/m³ against 12.5, on the 60 days both cities were measured. Beroun had the dirtier air on 48 of those days, Kladno on 11. Beroun was over the WHO's daily guideline of 15 µg/m³ on 30 of them, Kladno on 15.
Right now
The last year, day by day
Month by month
Year by year
| Year | Beroun | Kladno | Days Beroun was worse |
|---|---|---|---|
| 2026 so far | 67 | 62 | 21 |
| 2025 | 64 | 57 | 104 |
| 2024 | 62 | 58 | 126 |
| 2023 | 63 | 58 | 182 |
Means in US AQI over the days both cities were measured that year; a year shows once they share 30 such days.
Each city's worst days
Beroun
- 25 Jan 202615764.1 µg/m³
- 24 Jan 202613348.4 µg/m³
- 22 Jan 202611641.6 µg/m³
Kladno
- 24 Jan 202613750.2 µg/m³
- 25 Jan 202611842.5 µg/m³
- 23 Jan 202610838.3 µg/m³
Daily means in US AQI, with µg/m³ beside them, since the index stops at its top value, over the days both cities were measured in the last year. Each date opens that day's world board.
Compare either city with another
Beroun
Side by side with Gujranwala (the world's worst on 30 days).
Kladno
Side by side with Gujranwala (the world's worst on 30 days).
Use this page
SmogRank, PM2.5 daily means compared, Beroun and Kladno, 10 Oct 2025 – 9 Oct 2026, smogrank.com/compare/cz-beroun/cz-kladno (accessed 10 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.
Updated 2026-10-10 10:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).