SmogRank / World / Czechia / Central Bohemia / April 2026
Most polluted cities in Central Bohemia, Czechia, April 2026
1 city in Central Bohemia, Czechia ranked by their average PM2.5 over the 30 days. The only one: Říčany at 14.5 µg/m³, #601 of 2,914 cities in the world. A city needs measurements on 70% of the days to be ranked.
- 1Říčanylow-cost sensors 61
Low-cost sensors: consumer units, counted only in cities with no government-grade monitor; they read close to reference monitors on the whole, but 15 to 25% high in humid air. How we use them.
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
All cities in the world, April 2026 · All cities in Czechia, April 2026 · Central Bohemia now
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SmogRank, most polluted cities in Central Bohemia, Czechia, PM2.5, April 2026, smogrank.com/cz/region/central-bohemia/history/2026-04 (accessed 7 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.