中国城市地下水饮用水源地水质状况评价

根据调查的全国建制市和县级城镇的集中式地下水饮用水水源地水质监测结果,评价了我国城市地下水饮用水水源地的水质安全状况、污染特征、变化趋势等,为城市饮用水安全保障提供了重要的基础。评价结果表明,按照水质综合评价方法,全国城市1 817个地下水饮用水源地中,水质安全存在问题的比例高达49.48%,其中有一般理化指标,也有有毒类物质。按照人为污染因子进行评价,不考虑天然水文地球化学特征的影响,有25.88%的水源地受到不同程度的人为污染。

Groundwater quality assessment of urban drinking water sources in China

According to the groundwater quality monitoring data in drinking water source areas in the urban areas of China,the water quality security,pollution characteristics,and water quality changes were studied.The results show that, using general water quality evaluation methods,water quality in 49.48% of 1817 underground drinking water sources exceeds the water quality standard for one or more chemicals or toxic compounds.If the components controlled by natural hydrogeological characteristics are excluded and only the chemicals or indicators induced by human activities are taken into account,25.88% of the groundwater sources were polluted.