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

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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 Air Quality Index in Delhi dropped to 999 over the weekend, making it the most polluted capital city in the world. While the safe limit set by the World Health Organisation is 25, anything ...

Tens of thousands of people have evacuated their homes and at least two have died in raging fires sweeping across Los Angeles County Wednesday. Multiple wildfires spread by strong Santa Ana winds ...

The revelry took the air quality index above 350 at most stations. The AQI for Anand Vihar was 386 at 11 pm on the night of October 31 â much higher than last year's 302 on Diwali night.