Air Quality Index at different places in Delhi last Friday (29th May)

LegendĀ 
0-50 Minimal impact
51-100 | Minor breathing discomfort to sensitive people
101-200 | Breathing discomfort to the people with lungs, asthma and heart diseases
201-300 | Breathing discomfort to most people on prolonged exposure
301-400 | Respiratory illness on prolonged exposure
401-500 | Affects healthy people and seriously impacts those with existing diseases

Click on the timings to know the AQI levels

Source: Central pollution control board Get the data