It's been fluctuating throughout the day. PurpleAir is showing even worse levels in SF currently (over 300 US PM2.5 AQI). - https://www.purpleair.com/map?opt=1

It's been fluctuating throughout the day. PurpleAir is showing even worse levels in SF currently (over 300 US PM2.5 AQI). - https://www.purpleair.com/map?opt=1/mAQI/a10/cC0&select=54351#13.27/37.77363/-122.43602 https://www.purpleair.com/map?opt=1/mAQI/a10/cC0&select=5435... - https://i.imgur.com/9N6ua2G.png https://i.imgur.com/9N6ua2G.png (screenshot)