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目的了解并掌握中山市生活饮用水出厂水水质的卫生状况,为改善生活饮用水水质提供科学依据。方法采用定期抽样的方法,每季度对中山市城区和各镇区的生活饮用水出厂水进行采样分析,分析研究的项目类别主要包括毒理指标(砷、镉、6价铬、铅、汞、硒、氰化物、氟化物、硝酸盐、三氯甲烷、四氯化碳、三氯乙烯、四氯乙烯、马拉硫磷、对硫磷、甲基对硫磷、乐果、敌敌畏、苯、甲苯、二甲苯、乙苯、苯乙烯、毒死蜱等)、感官性状和一般化学指标(色度、浑浊度、臭和味、肉眼可见物、pH值、铝、铁、锰、锌、铜、氯化物、硫酸盐、溶解性总固体、总硬度、耗氧量、挥发酚类、阴离子合成洗涤剂等),放射性指标(总α放射性、总β放射性等)、微生物指标(菌落总数、总大肠菌群、耐热大肠菌群、大肠埃希菌等)和消毒剂常规指标(游离氯、总氯等)。结果分析评价的生活饮用水出厂水水质共309份,所检项目全部达到国家《生活饮用水卫生标准》(GB5749-2006)的共289份,达标率为93.5%。结论中山市城区和各镇区的生活饮用水出厂水水质卫生质量总体较好,但相关部门也要全方位地对供水质量保持高度重视,确保供水的卫生与安全。
Objective To understand and master the health status of water quality of drinking water in Zhongshan City and provide scientific basis for improving the quality of drinking water. Methods Sampling analysis was carried out on a quarterly basis in the factory water of drinking water in urban areas and towns in Zhongshan City. The categories of toxic and chemical substances (arsenic, cadmium, hexavalent chromium, lead, mercury, Selenium, cyanide, fluoride, nitrate, trichloromethane, carbon tetrachloride, trichlorethylene, tetrachlorethylene, malathion, parathion, methyl parathion, dimethoate, dichlorvos, Chlorpyrifos, etc.), sensory traits and general chemical indicators (color, turbidity, smelly and taste, macroscopic, pH, aluminum, iron, manganese, zinc, copper, chlorine (Total α radioactivity, total β radioactivity, etc.), microbial indicators (total number of colonies, total coliforms Group, heat-resistant coliforms, Escherichia coli, etc.) and disinfectants conventional indicators (free chlorine, total chlorine, etc.). Results A total of 309 samples of drinking water quality were analyzed and evaluated. All the items seized reached 289 samples of the national drinking water health standard (GB5749-2006) with the compliance rate of 93.5%. Conclusion The water quality of domestic drinking water quality in urban areas and towns in Zhongshan City is generally good, but relevant departments should also attach great importance to water quality in all aspects to ensure the hygiene and safety of water supply.