AirTrack estimates the air you actually breathe throughout your day, not just the pollution at a single location.
It combines:
- Location / GPS data to understand where you are and the route you take
- Outdoor air quality data from our own air quality models, which build on global forecasts (NASA GEOS-CF worldwide and Copernicus CAMS across Europe) and add emissions, land use, roads, weather and ground monitoring data. See Where does the data come from? for details
- Route and context modelling to adjust for where you travel (e.g. busy roads vs quieter streets) and how you travel (e.g. walking, cycling, driving)
- Indoor modelling to account for how outdoor pollution enters buildings, plus indoor sources like cooking or ventilation
AirTrack then calculates your personal exposure by combining:
- pollution levels
- time spent in each environment
- your activity level (e.g. resting vs exercising)
This produces a time-weighted exposure score, giving you a clearer picture of your real-world air pollution exposure. Accuracy is validated against monitoring stations and tested using standard cross-validation methods.
Read this document to understand more about how AirTrack works including how we get the data and how the AirTrack Score is calculated.
