Mumbai ranked second most polluted city in weekly world ranking...

Temperature rising...

Mumbai: over the past two days temperature rising, according to Swiss air tracking index IQAir, Mumbai was the second most polluted city in the world within a week between January 29 and February 8. 

Mumbai was ranked 10th on January 29, in IQAir rankings for the poorest city’s. On February 2 it appears on top and then comes back again to second position on February 8. On February 13, it comes in the third unhealthiest city in the world for air quality, overtaking even Delhi which was India's most polluted metro till date. 

IQAir partners with UNEP and Greenpeace and uses Central Pollution Control Board data (CPCB) in India to assess air quality. Categorization into 'healthy', unhealthy' and 'hazardous' is as per US air quality index (AQI) standards, which are more stringent than in India.

The world top 10 polluted cities

(Data for Jan 29 - Feb 8, 2023)

Rank City & country:-

1 Lahore (Pakistan)

2 Mumbai (India)

3 Kabul (Afghanistan)

4 Kaohsiung (Taiwan)

5 Bishkek (Kyrgyzstan)

6 Accra (Ghana)

7 Krakow (Poland)

8 Doha (Qatar)

9 Astana (Kazakhstan)

10 Santiago (Chile)

This year winter was more than double from last three years winters, poor and very poor days in Mumbai in November-January, according to CPCB data. Experts says, mainly because of dust and smoke constantly coming from vehicles, constructions and roads. Pacific Ocean temperature has also a major reason by reducing dispersal of pollutants.

Road and dust comes from construction activities is the biggest source of over 71% of the pollution according to a 2020 study by NEERI. The rest comes from industrial and power units, airports, and garbage dumps.