　

12-14 Monitoring of Urban Environment Noise in Key Cities under National Control Programme (2003)

City	Grid Length	Grid Width	Total number	Sound Level
City	(m)	(m)	of Grids (unit)	LeqdB(A)

Beijing	1000	1000	428	53.6
Tianjin	1000	1000	205	55.0
Shijiazhuang	500	500	240	54.0
Taiyuan	750	750	232	53.8
Hohhot	400	400	204	54.0

Shenyang	750	750	240	53.5
Changchun	500	500	204	57.0
Harbin	700	700	216	56.1

Shanghai	1414	1414	204	56.7
Nanjing	1000	1000	210	54.3
Hangzhou	500	500	235	56.0
Hefei	500	500	250	52.5
Fuzhou	500	500	220	56.3
Nanchang	500	500	201	55.8
Jinan	1000	1000	426	48.6

Zhengzhou	500	500	235	55.9
Wuhan	1000	1000	210	55.1
Changsha	500	500	288	53.8
Guangzhou	1000	1000	202	54.5
Nanning	550	550	200	56.2
Haikou	400	400	203	56.1

Chongqing	500	500	661	55.0
Chengdu	900	900	215	54.8
Guiyang	500	500	220	55.8
Kunming	800	800	223	54.6
Lhasa				55.6

Xi'an	500	500	212	55.6
Lanzhou	375	375	224	58.0
Xining	500	500	200	51.3
Yinchuan	750	750	209	51.1
Urumqi	1000	1000	428	53.4