Air quality of major Chinese cities -- June 21

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Report on the quality of air in 47 major Chinese cities (12:00 June 20, 2012, to 12:00 June 21, 2012, Beijing Time), released by the China Environmental Monitoring Center:

City	Major Pollutant	Air Quality Level
Beijing	particulate matter	III1
Tianjin	particulate matter	II
Shijiazhuang	particulate matter	II
Qinhuangdao	particulate matter	II
Taiyuan	particulate matter	II
Hohhot	particulate matter	II
Shenyang	particulate matter	II
Dalian	particulate matter	II
Changchun	---------	I
Harbin	particulate matter	II
Shanghai	---------	I
Nanjing	particulate matter	II
Suzhou	particulate matter	II
Nantong	particulate matter	II
Lianyungang	particulate matter	II
Hangzhou	---------	I
Ningbo	---------	I
Wenzhou	particulate matter	II
Hefei	particulate matter	II
Fuzhou	---------	I
Xiamen	---------	I
Nanchang	particulate matter	I
Jinan	particulate matter	II
Qingdao	---------	I
Yantai	particulate matter	II
Zhengzhou	particulate matter	II
Wuhan	particulate matter	II
Changsha	particulate matter	II
Guangzhou	particulate matter	II
Shenzhen	particulate matter	II
Zhuhai	particulate matter	II
Shantou	----------	I
Zhanjiang	----------	I
Nanning	particulate matter	II
Guilin	particulate matter	II
Beihai	particulate matter	II
Haikou	----------	I
Chongqing	particulate matter	II
Chengdu	particulate matter	III1
Guiyang	particulate matter	III1
Kunming	particulate matter	II
Lhasa	----------	I
Xi'an	particulate matter	II
Lanzhou	particulate matter	II
Xining	particulate matter	II
Yinchuan	particulate matter	II
Urumqi	particulate matter	II

The center classifies air quality in China's urban areas into five levels: level I or excellent (pollution reading: not exceeding 50), level II or fairly good (pollution reading: 51 to 100), level III or slightly polluted (pollution reading: 101 to 200), level IV or poor (pollution reading: 201 to 300), and level V or hazardous (pollution reading: over 301).

The 47 cities monitored by the center include the four municipalities of Beijing, Tianjin, Shanghai and Chongqing, provincial (or autonomous regional) capitals, and major cities in economically developed coastal areas, and tourist attractions.