Worst air pollution Lahti, today and tomorrow
Today (16 July): Air quality in Lahti is fair. AQI and NO2 are fair; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 26.0/100).
Tomorrow (17 July 2026): Air quality in Lahti is fair. O3 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 AM (NO2: 32.2/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Lahti's air quality is generally good by European standards, with Lake Vesijärvi's consistent lake breezes and clean Finnish boreal forest airflows providing natural ventilation. Vehicle traffic on the E12 motorway and wood-burning stoves during the long cold winters are the primary local sources throughout the year.
Today - 16 July | Pollution peaks at 23:00
AQI:
Fair
26.0/100
PM2.5 (fine particles):
Good
12.7/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Fair
26.0/100
O3 (ozone):
Good
16.8/100
SO2 (sulfur dioxide):
Good
4.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Good
13.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 04:00
AQI:
Fair
32.2/100
PM2.5 (fine particles):
Good
6.1/100
PM10 (coarse particles):
Good
1.7/100
NO2 (nitrogen dioxide):
Fair
32.2/100
O3 (ozone):
Fair
21.6/100
SO2 (sulfur dioxide):
Good
8.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.8/100
PM1 (ultrafine particles):
Good
8.2/100
Pollen forecast in Lahti
View pollen forecastFrequently Asked Questions
Is air quality bad in Lahti right now?
On 16 July 2026, overall air quality in Lahti is fair. AQI is the main air quality indicator at 26.0/100. Pollution peaks around 11:00 PM (NO2: 26.0/100).
Will air quality be worse tomorrow in Lahti?
On 17 July 2026, air quality conditions in Lahti will be similar to today, with AQI forecast at fair at 32.2/100. Pollution peaks around 4:00 AM (NO2: 32.2/100).
When is air pollution at its worst in Lahti?
People in Lahti tend to notice reduced air quality when birch and pine pollen peaks, or because of vehicle traffic on the E12 motorway and wood-burning stoves during the long cold winters; background levels usually settle back down once the season changes.
Are air quality levels in Lahti 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 Finland?
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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