Air Quality Index is a rating system that shows the severity of pollution in the air on a scale of 0 to 500, according to experts with the American Lung Association. An air quality index value under ...

and forecast models to provide real-time air quality index (AQI) readings for more than 1,000 locations. Los Angeles’ air quality is closely tied to weather patterns. Clear, breezy days help ...

The Air Quality Index (AQI) is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. For more ...