Got a loaner of a Piera Systems Canaree I5 air quality monitor and there's a pattern for the past few days. PM2.5 rises during the day and then drops off. A little while ago it was 77 (yellow) and then dropped as low as 13 (very green). Its connected to my PC on the Upper West Side of #nyc
#AQI
#AirQuality
#Canaree
#PieraSystems
#PM25