A. You can find out how many sensors are in a given area using the PurpleAir map.
- Zoom in on your desired area on the map.
(this is obviously an old picture)
You’ll want to focus on the Updated number of total features - this will give you the total number of sensors in the area you’ve zoomed in on. The Indoor and Outdoor numbers provide the breakdown of the total into the types of sensors in that area.