Worst air pollution Trnava, today and tomorrow
Today (16 July): Air quality in Trnava is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 50.0/100).
Tomorrow (17 July 2026): Air quality in Trnava is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 51.0/100). 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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Trnava's air quality reflects the flat Trnava lowland in the Danubian agricultural plain west of Bratislava, with vehicle traffic on the D1 motorway and the PSA Peugeot-Citroën Slovakia automotive manufacturing plant generating industrial and vehicle testing emissions. Winter temperature inversions on the flat Pannonian plain can concentrate automotive plant and heating emissions, while the automotive manufacturing character makes Trnava the most distinctively vehicle manufacturing-defined urban environment in Slovakia.
Today - 16 July | Pollution peaks at 16:00
AQI:
Medium
50.0/100
PM2.5 (fine particles):
Good
10.4/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Fair
28.4/100
O3 (ozone):
Medium
50.0/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.2/100
PM1 (ultrafine particles):
Good
13.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Medium
51.0/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Fair
39.1/100
O3 (ozone):
Medium
51.0/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.4/100
PM1 (ultrafine particles):
Good
18.1/100
Pollen forecast in Trnava
View pollen forecastFrequently Asked Questions
Is air quality bad in Trnava right now?
On 16 July 2026, overall air quality in Trnava is fair. NO2 is the main pollutant at 28.4/100. Pollution peaks around 4:00 PM (O3: 50.0/100).
Will air quality be worse tomorrow in Trnava?
On 17 July 2026, air quality conditions in Trnava will be similar to today, with NO2 forecast at fair at 39.1/100. Pollution peaks around 12:00 PM (O3: 51.0/100).
When is air pollution at its worst in Trnava?
You're most likely to spot worse air in Trnava when local combined tree and grass pollen peaks, or due to vehicle traffic on the D1 motorway and the PSA Peugeot-Citroën Slovakia automotive manufacturing plant; the rest of the calendar year is generally more forgiving for air quality.
Are air quality levels in Trnava 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 Slovakia?
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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