Yahoo19d
Is the Air Quality Index enough? What the AQI can — and can't — tell you about how healthy the atmosphere is.
The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) ...
LAist22d
Does a ‘good’ Air Quality Index rating mean it’s safe to be outdoors?
The index ranges from 0 to 500 and uses a color ... According to the experts, one reason AQI levels had returned to normal early this week was because the fires were producing less smoke.