General Situation

Urban Regional Environmental Noise:Among the 351 cities (counties) monitored, 11 cities (3.1%) had good urban area-wide acoustic environment, 213 cities (60.7%) had fairly good area-wide acoustic environment, 118 cities (33.6%) registered light noise pollution while 6 cities (1.7%) and 3 cities (0.9%) respectively recorded medium or heavy noise pollution.

Of the 46 national key cities on environmental protection monitored (excluding Lhasa City), the range of equivalent sound level of area-wide environmental noise was within 52.1～57.9 dB(A), and the area weighted average of the equivalent sound level was 54.5 dB(A).

Among the 46 national key cities of environmental protection, 26 cities (56.5%) enjoyed fairly good acoustic environment on urban areas while 20 cities (43.5%) had light noise pollution (LP). The acoustic environment on urban areas of all the key cities displayed no evident change compared with the previous year.

Annual Comparison of Equivalent Sound Level of Urban Area-wide Environmental Noise of the 47 National Key Cities on Environmental Protection in 2005

Road Traffic Noise: Among the 364 cities (counties) monitored, the average equivalent sound level of 185 cities (50.8%) was at or below 68.0 dB(A); 130 cities (35.7%) was within the range of 68.0 and 70.0 dB(A); 27 cities (7.4%) was within the range of 70.0 and 72.0 dB(A); 16 cities (4.4%) was within the range of 72.0～74.0 dB(A)  and 6 cities (1.7%) was above the level of 74.0 dB(A).

                                            State of Acoustic Environment of Urban Traffic Road in 2005

Of the 47 national key cities on environmental protection, the monitored road length totaled 7,153.2 km, of which the equivalent sound level of 2,034.5 km exceeded 70 dB(A), accounting for 28.4% of the total length. The average equivalent sound level fell into the range between 66.3～72.0 dB(A) and the weighted average of sound level on the length road was 68.7 dB(A).

 Annual Comparison of Equivalent Sound Level of Road Traffic Noise of the 47 National Key Cities on

Environmental Protection in 2005

Among the 47 national key cities on environmental protection, the average equivalent sound level of road traffic of Lhasa and Kunming city saw more than 1dB (A) of growth, while the city of Qinhuangdao, Yinchuan and Beihai witnessed more than 1 dB(A) of reduction in 2005 compared with the previous year.