Worst air pollution Castricum, today and tomorrow

On 9 August 2026, overall air quality in Castricum is fair. AQI is the main air quality indicator at 33.1/100. Pollution peaks around 4:00 PM (O3: 33.1/100).

On 10 August 2026, air quality conditions in Castricum will be similar to today, with AQI forecast at fair at 31.0/100. Pollution peaks around 12:00 AM (NO2: 31.0/100).

The main times to watch for Castricum are the birch, oak, and alder pollen peak across the spring and early-summer stretch, and hot, still days when local traffic on the A9 and industry emissions build up; the open coastal position means pollutants rarely linger long. Most weeks outside these periods bring Castricum conditions close to the broader Dutch norm.

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.