3 ms·
In addition to what other commenters have said, I'd guess that some purpleair sensors are placed in garages or other places with a local concern for air quality
by unsrsly 6y ago
In addition to what other commenters have said, I'd guess that some purpleair sensors are placed in garages or other places with a local concern for air quality. That may explain some of the local variation you see on purpleair.