In light of this improvement, the sub-committee decided to revoke the Stage-III measures, based on both the real ... which is about 55 AQI points below the threshold for invoking the GRAP Stage ...

Delhi’s average Air Quality Index (AQI) on Wednesday witnessed a marginal improvement of 46 points, however it remained ... daily AQI bulletin based on the average of the past 24 hours, released ...

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 ...