Smoke from thr Park Fire has, for the first time, obviously made it to the surface of the west side of the Sacramento Valley. I can smell it and the Purple sensor reports above 170 AQI #ParkFire #CAWx #AirQuality

The screenshot displays an air quality index (AQI) reading of 178 for Channel A and 177 for Channel B, alongside a historical graph and various particulate matter measurements. From the My Purple Air iOS app.