Delhi and Gurugram on Friday had their air qualities worsened to ‘very poor’ from ‘poor’ on Thursday.
Pollution Watch brings you the measure of Air Quality Index (AQI) in major cities across the country.
ALSO READ: Gurugram is now officially the world’s most polluted city; alarm enough?
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- 206
Shantipath- 316
R.K. Puram- 226 PM10
Shanti Niketan- 316
Dwarka- 234
HARYANA
Gurugram- 276
Faridabad- 237
Rohtak- 150
MUMBAI
Pirojshanagar- 63
MPCB Bandra- 59 PM10
Bandra East- 131 PM10
Lower Parel- 46
BENGALURU
BTM Layout- 124
BWSSB- 80
Peenya- 217
Saneguravahalli- 92 PM10
The pollution level figures are as per the data taken on Friday at 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