Why It's So Confusing to Determine Air Quality in Los Angeles Right Now
Briefly

"AirNow's fire map includes data from PurpleAir sensors, which often report differing air quality indices due to various calculations and processing delays across platforms."
"BreezoMeter estimates air quality on an hourly basis using a wide range of pollutants, integrating data from the EPA, PurpleAir sensors, satellites, and weather reports, exceeding many government systems in breadth and frequency."
Read at WIRED
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