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

as judged by the EPA's Air Quality Index rating system. Moderate air quality is between 51 and 100, or in the yellow band of the AQI scale. Air quality in the moderate range can still be risky for ...

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 ...

An AQI rating is categorized as follows: 0-50 (good), 51-100 (satisfactory), 101-200 (moderate), 201-300 (poor), 301-400 (very poor), and 401-500 (severe). The Met Department has predicted foggy ...