6-14 Environment Improvement
Items | 2004 | 2003
Environment Quality |  |
| (mg/m3) | 0.118 | 0.118
The Average Daily Indicators of Sulfur Dioxide | (mg/m3) | 0.075 | 0.059
| (mg/m3) | 0.042 | 0.045
Up-to-Standard Rate of Urban Drinking Water Quality |  | 96.6 | 96.5
Up-to-Standard Rate of Urban Surface Water Quality |  | 100.0 | 100.0
Average Daily Noise Value | (decibel) | 55.2 | 56.4
Average Indicator of Noise at Main Traffic Lines | (decibel) | 66.8 | 68.0
Pollution Control |  |
Coverage Rate of Soot Control |  | 100.0 | 100.0
Up-to-Standard Rate of Industrial Waste Water Discharge |  | 98.3 | 98.7
Up-to-Standard Rate of Automobile Exhaust Discharge |  | 89.3 | 89.3
Rate of Comprehensive Utilization of Solid Industrial Waste |  | 97.0 | 96.6
Rate of Disposal of Hazardous Waste |  | 100.0 | 100.0
Environment Improvement |  |
Rate of Disposal of City Waste Water |  | 66.8 | 65.8
Rate of Gas Utilization in the City |  | 92.6 | 91.8
Green Coverage Rate in Urban Constructed Areas |  | 37.5 | 36.1
Coverage Rate of Nature Preservation Areas |  | 10.6 | 10.6
Environment Treatment |  |
Indexes of Investment in Urban Environment Protection |  | 2.6 | 2.6