Worst air pollution Zagreb, today and tomorrow
Today (9 August): Air quality in Zagreb is fair. AQI, O3, and HCHO are fair; PM2.5, PM10, NO2, SO2, CO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 40.0/100).
Tomorrow (10 August 2026): Air quality in Zagreb is fair. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 52.7/100). Airmine updates local air quality forecasts four times daily.
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Zagreb's air quality faces winter challenges, with residential wood and coal burning generating elevated PM2.5 during cold periods alongside vehicle traffic on the ring road. The Sava river valley and the surrounding Medvednica massif create topographic variation in pollution exposure across the city, while the flat Pannonian plain to the east provides good dispersal on days with appreciable winds.
Today - 9 August | Pollution peaks at 14:00
AQI:
Fair
40.0/100
PM2.5 (fine particles):
Good
10.9/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Good
11.4/100
O3 (ozone):
Fair
40.0/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.6/100
PM1 (ultrafine particles):
Good
14.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 15:00
AQI:
Medium
52.7/100
PM2.5 (fine particles):
Good
12.9/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Good
18.0/100
O3 (ozone):
Medium
52.7/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
27.9/100
PM1 (ultrafine particles):
Good
18.1/100
Pollen forecast in Zagreb
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Frequently Asked Questions
Is air quality bad in Zagreb right now?
On 9 August 2026, overall air quality in Zagreb is fair. AQI is the main air quality indicator at 40.0/100. Pollution peaks around 2:00 PM (O3: 40.0/100).
Will air quality be worse tomorrow in Zagreb?
On 10 August 2026, air quality conditions in Zagreb will be similar to today, with HCHO forecast at fair at 27.9/100. Pollution peaks around 3:00 PM (O3: 52.7/100).
When is air pollution at its worst in Zagreb?
Zagreb residents notice reduced air quality mainly when birch pollen peaks, and during spells of residential wood and coal burning; a shift to wetter or windier weather typically brings noticeable relief.
Are air quality levels in Zagreb 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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