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The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) ...

Angelenos still bothered by the smell of smoke may be surprised to see that Air Quality Index numbers returned to “healthy” or “moderate” levels this week in L.A. County, but they shouldn ...

The CAQM stated in its order, “The air quality parameters, however, further worsened owing to a drastic reduction in the mixing layer height and continued absolute calm-wind conditions over Delhi.