Worst air pollution Roskilde Festival (Festivalplassen) - Roskilde, today and tomorrow

On 4 August 2026, overall air quality in Roskilde Festival (Festivalplassen) is fair. AQI is the main air quality indicator at 29.6/100. Pollution peaks around 2:00 AM (NO2: 29.6/100).

On 5 August 2026, air quality conditions in Roskilde Festival (Festivalplassen) will be similar to today, with AQI forecast at fair at 39.4/100. Pollution peaks around 12:00 PM (O3: 39.4/100).

Roskilde Festival's air quality dips are almost entirely tied to the festival period itself, when concentrated traffic and dust from tens of thousands of trampled-grass campsite pitches replace the fjord's usual Kattegat ventilation as the dominant factor. Outside the festival window, conditions revert to the fjord's typical moderate baseline.

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.

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.