How does AirTrack work?

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 the Google Air Quality API, which integrates satellite data, reference monitors, low-cost sensors, weather, and traffic
• 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.