目的:通过分析射阳县枯水期和丰水期居民生活饮用水出厂水、末梢水中三氯甲烷的浓度,了解本县居民饮用水中的三氯甲烷的污染情况.方法:依据《生活饮用水标准检验方法 第 8 部分:有机物指标》(GB/T 5750.8-2023)中顶空气相色谱法检测射阳县 2021-2022 年生活饮用水样品中三氯甲烷含量,采用统计软件进行分析,P<0.05 为有统计学差异,并对饮水途径的健康风险进行初步评价.结果:2021-2022 年累计检测水样 426 份,其中枯水期水样 213 份,丰水期水样 213 份,合格率为 100%,年致癌风险为7.07×10-6,危害指数为 0.022 8.结论:2021-2022 年射阳县生活饮用水水样中均检出三氯甲烷,但没有超出国家标准,存在一定的健康风险.
Objective:To understand the pollution situation of trichloromethane in drinking water of residents in Sheyang county by analyzing the concentration of trichloromethane in factory water and peripheral water during the dry and high water periods.Method:According to the headspace gas chromatography method in GB/T 5750.8-2023,the content of trichloromethane in drinking water samples from Sheyang county from 2021 to 2022 was detected.Statistical software was used for analysis,and P<0.05 was used as the statistical difference.A preliminary evaluation was conducted on the health risks of drinking water routes.Result:From 2021 to 2022,a total of 426 water samples were detected,including 213 samples during the dry season and 213 samples during the high season,with a qualification rate of 100%and an annual cancer risk of 7.07×10-6,harm index is 0.022 8.Conclusion:Trichloromethane was detected in drinking water samples from Sheyang county from 2021 to 2022,but it did not exceed the national standard for birth,posing a certain health risk and within an acceptable range.