Worst air pollution Leszno, today and tomorrow
Today (9 August): Air quality in Leszno is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (O3: 41.2/100).
Tomorrow (10 August 2026): Air quality in Leszno is fair. All pollutants stay as today. Pollution peaks around 1:00 PM (O3: 48.6/100). 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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Leszno's air quality reflects the flat Greater Poland lowland in western Poland, with vehicle traffic on the S5 expressway and the surrounding manufacturing and agri-food industry contributing local sources. Winter residential coal and wood burning generates seasonal PM2.5 elevation, while the flat Great Poland plain provides reasonable wind dispersal on most days and consistent Atlantic westerlies from the German border region provide the primary background ventilation throughout the year.
Today - 9 August | Pollution peaks at 18:00
AQI:
Medium
41.2/100
PM2.5 (fine particles):
Good
11.4/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Fair
22.4/100
O3 (ozone):
Medium
41.2/100
SO2 (sulfur dioxide):
Good
8.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
10.3/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 13:00
AQI:
Medium
48.6/100
PM2.5 (fine particles):
Good
16.8/100
PM10 (coarse particles):
Good
10.1/100
NO2 (nitrogen dioxide):
Fair
23.0/100
O3 (ozone):
Medium
48.6/100
SO2 (sulfur dioxide):
Good
10.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.1/100
PM1 (ultrafine particles):
Good
14.2/100
Pollen forecast in Leszno
View pollen forecastFrequently Asked Questions
Is air quality bad in Leszno right now?
On 9 August 2026, overall air quality in Leszno is fair. NO2 is the main pollutant at 22.4/100. Pollution peaks around 6:00 PM (O3: 41.2/100).
Will air quality be worse tomorrow in Leszno?
On 10 August 2026, air quality conditions in Leszno will be similar to today, with NO2 forecast at fair at 23.0/100. Pollution peaks around 1:00 PM (O3: 48.6/100).
When is air pollution at its worst in Leszno?
Residents in Leszno are most likely to notice reduced air quality when oak and birch pollen peaks, or due to vehicle traffic on the S5 expressway and the local manufacturing and agri-food industry; a change of season or a spell of wind usually clears things up again.
Are air quality levels in Leszno 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: 10 August 2026 at 02:34 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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