Most polluted cities of the world

This list contains the list of cities by PM2.5 annual mean concentration measurement whose measurement is greater than or equal to the air quality guideline (AQG) of 10 as documented by the World Health Organization covering the period from 2008 to 2013, with the majority of values for the years 2011 and 2012. The WHO database contains results of ambient (outdoor) air pollution monitoring from almost 1600 cities in 91 countries. Air quality in the database is represented by the annual mean concentration of particulate matter (PM10 and PM2.5, i.e. particles smaller than 10 or 2.5 micrometres).

World's most polluted cities

And 13 in top 20 are in INDIA.............

Position	Country	City	PM2.5	PM2.5 Year	PM10	PM10 Year
1	India	Delhi	153	2013	286	2010
2	India	Patna	149	2013	164	2011
3	India	Gwalior	144		329	2012
4	India	Raipur	134		305	2012
5	Pakistan	Karachi	117	2010	273	2010
6	Pakistan	Peshawar	111	2010	540	2010
7	Pakistan	Rawalpindi	107	2010	448	2010
8	Iran	Khoramabad	102	2010	121	2010
9	India	Ahmedabad	100	2013	67	2011
10	India	Lucknow	96		219	2010
11	India	Firozabad	96		219	2010
12	Qatar	Doha	93	2012	168	2012
13	India	Kanpur	93		212	2010
14	India	Amritsar	92		210	2012
15	India	Ludhiana	91		207	2012
16	Turkey	Igdir	90		135	2010
17	Bangladesh	Narayanganj	89	2013	181	2013
18	India	Allahabad	88		202	2010
19	India	Agra	88		200	2010
20	India	Khanna	88		200	2012

                                                      Source: WIKIPEDIA

The Warrior

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