India, March 16 -- All anti-pollution measures under the Graded Response Action Plan (GRAP) in Delhi-NCR were revoked on Monday as the AQI of Delhi "has shown significant improvement" in the past few days, as per the Commission for Air Quality Management (CAQM).

Now revoked, measures under Stage-1 (for 'poor' AQI) were in force in the entire National Capital Region.

It noted that "owing to favourable meteorological conditions" - such as clear weather and rain - the Air Quality Index (AQI) stood at 119 at 4pm on March 16, Monday. That would be 'moderate' as per the AQI standards.

The categories are: Good (0-50), satisfactory (51-100), moderate (101-200), poor (201-300), very poor (301-400), and severe (401-500+).

The authority said the...