Important note: so-called "live" air quality measurements are in reality never "live" due to the nature of the measuring stations (taking measures takes time) and the way data is compiled and shared by the monitoring agencies. As a result typical delays range from 1 to 6 hours, which means you end up using "old" data or signaling a peak when in reality the pollution peak is already over.
This is solved by using models that predict air quality levels down to the hour. One option is to use https://plume.io
This is solved by using models that predict air quality levels down to the hour. One option is to use https://plume.io