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目的了解昆明市地下水重金属指标的污染情况及地下水的质量情况。方法收集1982-2008年昆明市地下水的检测结果。对每年150件左右的地下水的九项重金属指标的合格率进行计算。结果1982-2008年昆明市地下水重金属指标中以铁锰超标为主。80年代和90年代初水样中铁的合格率相对90年代末和2002年以后低是因为以前地下水作为大量的饮用水源,而在后期集中式供水增多,封停了一些地下水井。昆明市地下水的质量有下降的趋势,尤其以西边较为明显。结论昆明市地下水的重金属指标有污染加重的趋势,地下水的质量也有下降的趋势。有关部门要加大监督力度,增加检测的频率和范围。政府应制定相应的政策,确保市民能喝上健康干净的地下水。
Objective To understand the pollution of groundwater heavy metals in Kunming and the quality of groundwater. Methods The detection results of groundwater in Kunming from 1982 to 2008 were collected. Calculate the pass rate of nine heavy metals index of about 150 groundwater per year. Results From 1982 to 2008, groundwater heavy metals indicators in Kunming exceeded the standard of iron and manganese. The passing rates of iron in water samples in the 1980s and early 1990s relative to the late 1990s and beyond 2002 were due to the previous use of groundwater as a source of large quantities of drinking water and the subsequent increase in centralized water supplies and the closure of some groundwater wells. The quality of groundwater in Kunming tends to decline, especially in the west. Conclusions The heavy metal index of groundwater in Kunming tends to increase with the pollution, and the quality of groundwater also declines. Relevant departments should increase supervision and increase the frequency and scope of testing. The government should formulate corresponding policies to ensure that people can drink healthy and clean groundwater.