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Local Air Quality

Chapel Hill Public Library air quality data is collected every hour using the PurpleAir Dual Laser Air Quality Sensor. These sensors primarily measure PM2.5, which is particulate matter in the atmosphere with a diameter less than 2.5 microns. 

For more information, visit: https://www.purpleair.com/

For more information on interpreting PM 2.5 readings:

https://www.beatclouds.com/how-does-the-particulat...

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