I hooked up a PM2.5 sensor[1] I ordered during wildfires a few years ago, and the EPA's AirNow has been far more consistent with what I'm measuring than Purple

I hooked up a PM2.5 sensor[1] I ordered during wildfires a few years ago, and the EPA's AirNow has been far more consistent with what I'm measuring than Purple Air or IQAir. I think the source for that static map is here: https://gispub.epa.gov/airnow/ https://gispub.epa.gov/airnow/, and includes some projections. Accuweather and Windy.com have pretty good forecasts, but the ones that have been the most accurate this week for me are the US Forest Service's BlueSky models. California (might miss northern smoke) - https://tools.airfire.org/websky/v2/run/standard/CANSAC-1.33km/current https://tools.airfire.org/websky/v2/run/standard/CANSAC-1.33... CA, OR, ID, NV, UT, AZ - https://tools.airfire.org/websky/v2/run/standard/CANSAC-4km/current https://tools.airfire.org/websky/v2/run/standard/CANSAC-4km/... [1] Plantower PMS7003 are less than $20 on AliExpress. Here's a quick plot of the data https://i.imgur.com/FjABgpP.png https://i.imgur.com/FjABgpP.png including a spike where it was above a grill.