Originally Posted by
btppberk
The PurpleAir website is useful.
Was just looking at that. I've also got an app from the EPA, and one called AirVisual. Also using this map:
https://aqicn.org/map/california/
It's funny, amidst all the orange/red/purple in my area, there's this one green dot. Well, I was just over there and lemme tell ya, it ain't green! That sensor must be inside somebody's house next a fan
