6－13 Environment Improvement （2008－2009）
Items | 2009 | 2008
Environment Quality |  |
The Average Daily Indicators of Particulate Matter Inhaled | (mg/m3) | 0.083 | 0.079
The Average Daily Indicators of Sulfur Dioxide | (mg/m3) | 0.046 | 0.059
The Average Indicators of NO2 | (mg/m3) | 0.037 | 0.033
Up-to-Standard Rate of Urban Drinking Water Quality | (Percent) | 100.00 | 99.5
Up-to-Standard Rate of Urban Surface Water Quality | (Percent) | 100.00 | 85.6
Average Daily Noise Value | (decibel) | 55.8 | 55.1
Average Indicator of Noise at Main Traffic Lines | (decibel) | 66.8 | 67.5
Pollution Control |  |
Coverage Rate of Soot Control | (Percent) | 100.0 | 100.0
Up-to-Standard Rate of Industrial Waste Water Discharge | (Percent) | 98.7 | 98.5
Rate of Comprehensive Utilization of Solid Industrial Waste | (Percent) | 98.6 | 98.7
Rate of Disposal of Hazardous Waste | (Percent) | 100.0 | 100.0
Environment Improvement |  |
Treatment rate of pown Domestic Sewage | (Percent) | 89.7 | 77.4
Rate of Gas Utilization in the City | (Percent) | 99.5 | 98.5
Green Coverage Rate in Urban Constructed Areas | (Percent) | 43.2 | 43.0