What does central number mean?

It is a weighted compound of the different pollutants measured by Foobot and is referred to as the global index.

Thresholds

Global Index value Air quality's level
0 - 25 Great
25 - 50 Good
50 - 75 Fair
75 - 100 Poor

Keep your average global pollution below 50% for the benefit of your health and well-being.

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