Delhi has shown a trend of poor air quality owing to the cold winds and low temperatures, while Gurugram has been showing some fluctuation.
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- 334
Shantipath- 400
R.K. Puram- 400
Shanti Niketan- 400
Dwarka- 373
HARYANA
Gurugram- 288
Faridabad- 318
Rohtak- 93
MUMBAI
Pirojshanagar- 146
MPCB Bandra- 183
Bandra East- 249
Lower Parel- 135
BENGALURU
BTM Layout- 145
BWSSB- 64
Peenya- 133
Saneguravahalli- 160 PM10
The pollution level figures are as per the data taken on Friday between 10:00 and 11:00 IST unless mentioned otherwise. The NGT has formed a committee to look for ways to combat the growing hazards for air pollution in Delhi.