Worst air pollution Brno, today and tomorrow
Today (16 July): Air quality in Brno is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 48.7/100).
Tomorrow (17 July 2026): Air quality in Brno is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 56.9/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Brno's air quality reflects its position in the South Moravian basin, with vehicle traffic on the D1 and D2 motorway interchange and the surrounding manufacturing industry contributing elevated NO₂ and PM2.5. The Bohemian-Moravian Highlands to the northwest provide partial topographic shelter, while winter residential wood and coal burning adds seasonal PM2.5 in this second-largest Czech city. Atlantic westerlies generally provide reasonable ventilation on most wind days.
Today - 16 July | Pollution peaks at 16:00
AQI:
Medium
48.7/100
PM2.5 (fine particles):
Good
11.9/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Good
14.9/100
O3 (ozone):
Medium
48.7/100
SO2 (sulfur dioxide):
Good
5.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
16.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 11:00
AQI:
Medium
56.9/100
PM2.5 (fine particles):
Good
12.5/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Fair
23.5/100
O3 (ozone):
Medium
56.9/100
SO2 (sulfur dioxide):
Good
4.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.0/100
PM1 (ultrafine particles):
Good
17.4/100
Pollen forecast in Brno
View pollen forecastFrequently Asked Questions
Is air quality bad in Brno right now?
On 16 July 2026, overall air quality in Brno is medium. AQI is the main air quality indicator at 48.7/100. Pollution peaks around 4:00 PM (O3: 48.7/100).
Will air quality be worse tomorrow in Brno?
On 17 July 2026, air quality conditions in Brno will be worse than today, with NO2 forecast at fair at 23.5/100. Pollution peaks around 11:00 AM (O3: 56.9/100).
When is air pollution at its worst in Brno?
Reduced air quality in Brno is most likely when birch and oak peaks pollen peaks, alongside periods of vehicle traffic on the D1 and D2 motorway interchange and the neighbouring manufacturing industry; background levels usually settle back down once the season changes.
Are air quality levels in Brno based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Want to see air quality forecasts for other cities in Czechia?
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app