北京市海淀区自备井水质卫生调查

目的了解北京市海淀区自备水源井的供水情况、水质卫生状况,为改善生活饮用水质,安全饮水提供科学依据。方法对辖区内225眼自备水源井进行卫生学调查,按照《生活饮用水标准检验方法》(GB/T5750-2006)进行检验;用《生活饮用水卫生标准》(GB5749-2006)对水质状况进行评价。结果采集水样225件,合格151件,总合格率为67.1%。检测水质的25项指标中,有11项指标出现过超标情况,按超标严重程度前4位的依次为硝酸盐(以N计)、总大肠菌数、砷、菌落总数,超标率分别为16.0%、6.7%、5.3%及4.4%。自备井的建井时间、井深是水质的可能影响因素。结论海淀区自备水源井水质部分指标未达到国家规定的饮水标准,应加强管理,采取针对性的改善措施。

Survey on THE underground drinking water quality in Haidian District of Beijing

OBJECTIVE To investigate the current situation and quality of underground drinking water in Haidian District of Beijing, and to provide the scientific evidence for improving drinking water quality. METHODS The survey was conducted in 2007, and we used questionnaires to investigate 225 Water wells in Haidian District. Water samples were analyzed according to the National Standard Determination. Methods for Drinking Water Quality (GB / T 5750-2006). The assessment was made with the National Hygienic Standard for Drinking Water Quality (GB 5749-2006). RESULTS Among the 225 specimens collected in 2007, 151 specimens were beyond the National Hygienic Standard. The total eligible rate of water quality was 67.1%. 11 indexes were beyond the National Hygienic Standard among total 25 indexes. The main non-eligible indexes are nitrate (16.0%). The total number of coliform, arsenic and the total count of bacteria were 6.7% , 5.3% and 4.4% , respectively. Drinking water quality was related to the time and depth of building wells. CONCLUSION The quality of underground drinking water in several indexes was not satisfactory, which indicated that control and improve measures on the pollution should be taken in Haidian District.