Tianjin most dustiest city in China

According to a 2002 World Bank survey of 110 cities around the world (with a total population of 530 million), Tianjin was the most smokest and dustest city in China. It also ranked No. 3 in Asia, and No. 4 in the world.

Most polluted cities in the world

	City population thousands 2005	Particulate matter microgram per cubic meter		Sulfur dioxide microgram per cubic meter 1995-2001	Nitrogen dioxide microgram per cubic meter 1995-2001
		1999	2002
Delhi	15,334	187	177	24	41
Tianjin	9,346	149	139	82	50
Chongqing	4,975	147	137	340	70
Shenyang	4,916	120	112	99	73
Zhengzhou	2,250	116	108	63	95
Lanzhou	1,788	109	101	102	104
Beijing	10,849	106	99	90	122
Taiyuan	2,516	105	98	211	55
Nanchang	1,742	94	87	69	29
Wuhan	6,003	94	88	40	43
Harbin	2,898	91	85	23	30
Changchun	3,092	88	82	21	64
Shanghai	12,665	87	81	53	73
Guiyang	2,467	84	78	424	53
Kunming	1,748	84	78	19	33
Guangzhou	976	74	70	57	136
Urumqi	1,467	61	57	60	70
Dalian	2,709	60	55	61	100
New York	18,498	23	22	26	79
Paris	9,854	15	12	14	57

sources 1, 2, 3