Originally Posted by
unterhausen
WU has PM 2.5 and PM 10 numbers on the wundermap. Is that actually usable?
For wildfire smoke, I'd just use the PM2.5. I believe that's what's indicated. I don't know if there's a conversion applied. Comparing Purple Air and WU, the numbers near me are currently within one or two units, while the uncoverted PA numbers are about 15 units higher.