Worst air pollution Horten, today and tomorrow
Today (16 July): Air quality in Horten is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 33.0/100).
Tomorrow (17 July 2026): Air quality in Horten is fair. NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 5:00 PM (O3: 35.0/100). 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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Horten's naval-town waterfront benefits from steady Oslofjord airflow, keeping background air quality generally good, with ferry and harbour traffic the main localized contributor near the centre.
Today - 16 July | Pollution peaks at 13:00
AQI:
Fair
33.0/100
PM2.5 (fine particles):
Good
11.4/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Fair
26.0/100
O3 (ozone):
Fair
33.0/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.7/100
PM1 (ultrafine particles):
Good
13.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 17:00
AQI:
Fair
35.0/100
PM2.5 (fine particles):
Good
9.9/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Good
18.5/100
O3 (ozone):
Fair
35.0/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Good
10.6/100
Pollen forecast in Horten
View pollen forecastFrequently Asked Questions
Is air quality bad in Horten right now?
On 16 July 2026, overall air quality in Horten is fair. AQI is the main air quality indicator at 33.0/100. Pollution peaks around 1:00 PM (O3: 33.0/100).
Will air quality be worse tomorrow in Horten?
On 17 July 2026, air quality conditions in Horten will be similar to today, with AQI forecast at fair at 35.0/100. Pollution peaks around 5:00 PM (O3: 35.0/100).
When is air pollution at its worst in Horten?
The clearest air quality impact in Horten comes when temperature inversions settle in overnight, when calm, low-lying terrain can hold smoke and traffic fumes close to town. Oslofjord-influenced airflow generally restores good conditions within a day or so. Apart from these spells, Horten generally enjoys favourable air quality.
Are air quality levels in Horten 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 Norway?
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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