💨 Air Quality

What you’re seeing: the shaded surface is AirNow’s regional AQI analysis — the same one their national map draws. The dots are individual reporting monitors, each showing its own live reading, so you can see whether a number comes from a station next door or one a hundred miles upwind. Both are PM2.5 and ozone, the two pollutants that drive the AQI here; wildfire smoke shows up as PM2.5. For the smoke plumes overhead, see Fire & Smoke.