This measure, based on data from the Environmental Protection Agency, evaluates states on the number of days the Air Quality Index in counties was not rated “good.” U.S. News calculated a ...

AQI is calculated into six color-coded categories — the higher ... vehicle exhaust and other sources. The American Lung ...

Delhi on Saturday recorded an average Air Quality Index (AQI) of 85, which is the lowest in the last three years for the period from January 1 to March 15. According to the Commission for Air ...

AQI is calculated into six color-coded categories ... vehicle exhaust and other sources. The American Lung Association said that air pollution can harm anyone but can be dangerous for many ...