Worst air pollution Hillerød, today and tomorrow
Today (16 July): Air quality in Hillerød is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 29.0/100).
Tomorrow (17 July 2026): Air quality in Hillerød is fair. All pollutants stay as today. Pollution peaks around 5:00 PM (O3: 32.0/100). 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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Hillerød records generally good air quality, helped by being tucked inland among North Zealand's lakes and forests rather than exposed to coastal shipping or heavy industry. Local traffic on the town's ring roads is the main source, and the wooded surroundings provide natural filtering that keeps readings modest year-round.
Today - 16 July | Pollution peaks at 16:00
AQI:
Fair
29.0/100
PM2.5 (fine particles):
Good
8.2/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
29.0/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.4/100
PM1 (ultrafine particles):
Good
8.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 17:00
AQI:
Fair
32.0/100
PM2.5 (fine particles):
Good
6.9/100
PM10 (coarse particles):
Good
2.3/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
32.0/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Good
6.9/100
Pollen forecast in Hillerød
View pollen forecastFrequently Asked Questions
Is air quality bad in Hillerød right now?
On 16 July 2026, overall air quality in Hillerød is fair. AQI is the main air quality indicator at 29.0/100. Pollution peaks around 4:00 PM (O3: 29.0/100).
Will air quality be worse tomorrow in Hillerød?
On 17 July 2026, air quality conditions in Hillerød will be similar to today, with AQI forecast at fair at 32.0/100. Pollution peaks around 5:00 PM (O3: 32.0/100).
When is air pollution at its worst in Hillerød?
Hillerød's air quality dips are linked mainly to local traffic on the town's ring roads, though being tucked inland among North Zealand's lakes and forests provides natural filtering that keeps readings modest most of the year.
Are air quality levels in Hillerød 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 Denmark?
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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