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目的 初步掌握龙岗区横岗街道塘坑背水库群主要供水水库的全年水质变化情况,从水质方面为政府供水和应急供水提供卫生学决策依据.方法 对塘坑背水库群的6座主要供水水库进行1个水文年的水样采集和检测,按(GB3838-2002)和水质指数(WQI),结合水库周边环境和水文特点分析水库水质情况.结果 塘坑背水库群6座主要供水水库水质检测合格率为31.18%,项次合格率为93.43%,超标项目主要是总氮、总磷;水库群各供水水库的WQI值均在60以下,水质尚可.结论 塘坑背水库群各主要供水水库水质尚好,基本符合作为供水和应急供水水源要求.“,”Objective To surey the water quality of the Tangkengbei reservoirs for water supply at Henggang Street and Longgang District. Methods The water of six main Tangkenghei reservoirs was sampled and tested in a hydrological year. According to the quality standard of the ground water (GB3838-2002) and water quality index (WQI),the water quality was analyzed by considering the environment and the hydrological features of the reservoirs. Results The overall qualification rate of six main Tangkengbei reservoirs was 31.18% and the item qualification rate was 93.43%. The value of the overall nitrogen and that of the overall phosphor were higher than those set by the quality standard. WQI of each reservoir was under 60. Conclusion The water quality of the main Tangkengbei reservoirs meet the standard of water supply and emergency water supply.