Worst air pollution Stjørdalshalsen, today and tomorrow
Today (9 August): Air quality in Stjørdalshalsen is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 PM (NO2: 17.5/100).
Tomorrow (10 August 2026): Air quality in Stjørdalshalsen is fair. AQI worsens to fair; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 AM (NO2: 21.6/100). Airmine updates local air quality forecasts four times daily.
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Stjørdalshalsen is the main town centre in Stjørdal municipality on the Stjørdalsfjord adjacent to Trondheim Airport Værnes, with vehicle traffic and the airport's aviation operations generating elevated NOₓ alongside local sources. Consistent Trondheimfjord maritime breezes provide background ventilation, while the aviation emissions represent the most distinctive local source and Stjørdalshalsen generally maintains moderate conditions throughout most of the year.
Today - 9 August | Pollution peaks at 22:00
AQI:
Good
17.5/100
PM2.5 (fine particles):
Good
2.5/100
PM10 (coarse particles):
Good
0.7/100
NO2 (nitrogen dioxide):
Good
17.5/100
O3 (ozone):
Good
12.5/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.7/100
PM1 (ultrafine particles):
Good
3.6/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 04:00
AQI:
Fair
21.6/100
PM2.5 (fine particles):
Good
2.5/100
PM10 (coarse particles):
Good
0.7/100
NO2 (nitrogen dioxide):
Fair
21.6/100
O3 (ozone):
Good
16.8/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
3.2/100
Pollen forecast in Stjørdalshalsen
View pollen forecastFrequently Asked Questions
Is air quality bad in Stjørdalshalsen right now?
On 9 August 2026, overall air quality in Stjørdalshalsen is good. AQI is the main air quality indicator at 17.5/100. Pollution peaks around 10:00 PM (NO2: 17.5/100).
Will air quality be worse tomorrow in Stjørdalshalsen?
On 10 August 2026, air quality conditions in Stjørdalshalsen will be worse than today, with AQI forecast at fair at 21.6/100. Pollution peaks around 4:00 AM (NO2: 21.6/100).
When is air pollution at its worst in Stjørdalshalsen?
Stjørdalshalsen's air quality is most affected when heavy commuter traffic coincides with calm winter weather, when temperature inversions over the flat agricultural lowlands trap emissions close to the ground. The open fjord and surrounding farmland generally provide good ventilation the rest of the year. Most of the year, conditions in Stjørdalshalsen stay comfortably within normal ranges.
Are air quality levels in Stjørdalshalsen 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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