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31st August 2021

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TIL Calculating the AQI based on the Purple Air API for a sensor — [Purple Air](https://www.purpleair.com/) sensors have an API at `https://www.purpleair.com/map.json?show=SENSOR-ID-HERE`, which returns JSON that looks something like this:
Posted 31st August 2021 at 7:46 pm

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