Many parts of North India witnessed heavy rain storms on Tuesday night, owing to which the AQIs in several states improved a lot.
Pollution Watch brings you the measure of Air Quality Index (AQI) in major cities across the country.
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The AQI is measured by taking into account the PM (particulate matter). The pollution of a place is measured either in PM10 or PM2.5, depending on which particle is more dominant in the air in that place.
PM10 is the particle which is 10 micrometers or less in diameter and PM2.5 is the finer particle with a diameter measuring 2.5 micrometers or less.
PM2.5 is considered more harmful since it is finer and can travel more deeply into the lungs and cause very harmful effects. These tiny particles in the air reduce visibility and cause the air to appear hazy when their levels are high.
| 0-30 | Good | |
| 31- 60 | Satisfactory | |
| 61- 90 | Moderate | |
| 91- 120 | Poor | |
| 121- 250 | Very Poor | |
| Beyond 250 | Severe |
*All levels are measured in PM2.5
DELHI
Mandir Marg- 71
Shantipath- 89
R.K. Puram- 80 PM10
Shanti Niketan- 89
Dwarka- 32
HARYANA
Gurugram- 61
Faridabad- 21
Rohtak- 50
MUMBAI
Pirojshanagar- 20
MPCB Bandra- 29
Bandra East- 146 PM10
Lower Parel- 84
BENGALURU
BTM Layout- 114
BWSSB- 81
Peenya- 120
Saneguravahalli- 100 PM10
The pollution level figures are as per the data taken on Wednesday at 12:00 IST unless mentioned otherwise. The NGT has formed a committee to look for ways to combat the growing hazards for air pollution in  Delhi