【摘要】 目的了解东莞市水源水的卫生状况。方法对东莞市镇级以上集中式供水单位2005～2009年水源水质进行抽样检测,按《地表水环境质量标准》(Ⅲ类)GB3838-2002进行评价和统计学分析。结果 5年共检验343份样本,总体合格率为11.37%;超标前五位的项目为铁、氯仿、锰、氨氮和汞;2005～2007年水源水的合格率均低于5%,而2008年为15.28%,2009年为26.39%,差异具有显著性(x2=26.492,P<0.01):丰、平、枯水期水源水合格率差异不具有显著性(x2=1.84,P>0.05):水库水水质最好,东深供水次之,东江水最差,差异具有显著性(x2=24.370,P<0.01)。结论:东莞市镇级以上集中式供水水源主要是受有机污染物污染,主要来源是城市污水和工业污水,2008和2009年水源水的卫生状况较2005～2007年有明显改善;必须加强对东江的卫生防护和环境保护。更多还原

【Abstract】 Objective To investigate the sanitary quality of water source in Dongguan City from 2005 to 2009.Methods Water source of centralized water supply in Dongguan from 2005 to 2009 was sampled and tested.The data of water source quality were evaluated according to<Environmental quality standard for surface water>(GB 3838-2002)and analyzed statistically.Results 343 samples were tested in five years.The levels of total eligible rate of source water is only 11.37%;The levels of iron,trichloromethane,manganese,ammonia-nitrogen,mercury exceeded the national standard.The eligible rate of source water during 2008 to 2009 was significantly higher than that during 2005 to 2007(x~2=26.492,P<0.01);There was no statisticaly significant difference between dry duration,ordinary duration and rainy duration(x~2=1.84,P>0.05).The reservoir water was the best,followed by water from Dong-Shen water supply engineering,and the source water from Dongjiang River was the last one with statistical significance(x~2=24.370,P<0.01).Conclusion Organic pollutants are the main pollutants in Dongguan City,and the main sources of pollution are domestic sewage and industrial effluents.The sanitary quality of water source during 2008 to 2009 has been remarkably improved than that during 2005 to 2007.Dongjiang River should be protected without deley.更多还原