The specifics of how confidence is calculated are found here: How the Confidence Score is Calculated The Confidence Score The Confidence Score is a numerical value displayed on the PurpleAir map ranging from 0 to 100 percent. Every sensor that contains two channels—the PurpleAir Classic, Classic …

The Confidence Score

Andrew (Andrew) January 14, 2025, 9:31pm 4

Sorry for the late response! We’ve written an article that describes it in more detail: How the Confidence Score is Calculated.

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