2017年北京市门头沟山区农村自备井水总硬度含量分析

目的了解2017年北京市门头沟山区农村自备井生活饮用水总硬度水平,为相关部门制定相应措施提供基础依据。方法对2017年门头沟山区全部正在使用的110口农村自备井水质进行监测,用《生活饮用水卫生标准》及《地下水质量标准》对结果进行评价及分类。结果2017年门头沟山区农村自备井生活饮用水总硬度均值为(329.35±83.16)mg/L,合格率为99.09%,以Ⅱ类水和Ⅲ类水为主。自备井水质总硬度高于山泉水,差异有统计学意义(t=6.213,P<0.01)。浅山区总硬度高于深山区,差异有统计学意义(t=2.224,P<0.05)。总硬度与p H值呈负相关,与硫酸盐、溶解性总固体呈正相关(均满足P<0.01)。结论2017年门头沟山区农村生活饮用水总硬度合格率较高,其中需对总硬度较高的8件Ⅳ类水(7.27%)采取适当的干预措施。

Analysis of total hardness of self-provided well water in mountainous areas of Mentougou District,Beijing in 2017

Objective To understand the total hardness level of drinking water in rural self-provided wells in mountainous area of Mentougou District,Beijing in 2017,so as to provide basis for relevant departments to formulate corresponding measures.Methods To monitor the water quality of 110 rural self-provided wells in the mountainous area of Mentougou District in2017.The results were evaluated and classified by Standards for Drinking Water Quality and Standards for Groundwater Quality.Results The average total hardness of drinking water in rural self-provided wells in mountainous area of Mentougou District was(329.35±83.16)mg/L,and the passing rate was 99.09%,mainly belonging to classⅡwater and classⅢwater.The total hardness of water quality of self-provided wells was higher than that of mountain spring water,and the difference was statistically significant(t=6.213,P<0.01).The total hardness of shallow mountainous area is higher than that of deep mountainous areas,and the difference is statistically significant(t=2.224,P<0.05).Total hardness was negatively correlated with p H,and positively correlated with sulfate and total soluble solid(P<0.01).Conclusion In 2017,the qualified rate of the total hardness of rural drinking water in the Mentougou mountain area was relatively high.Among them,appropriate intervention measures were required for 8 types of water with high total hardness(7.27%).