2014—2017年泗洪县农村集中式供水水质分析

Analysis of water quality of rural centralized water supply in Sihong County, 2014-2017

目的为及时掌握泗洪县农村饮用水水质及其动态变化,为卫生监管和保障饮水安全提供预见性资料。方法按照《生活饮用水标准检验方法》《生活饮用水卫生标准》对全县所有集中式供水水质进行检测和评价。结果共检测水样1 529份,合格1 189份,合格率77.76%;出厂水和末梢水合格率差异无统计学意义(χ2=0.67,P>0.05);枯水期水样合格率明显高于丰水期,差异有统计学意义(χ2=34.66,P<0.001);检测47 868项次,合格率98.571%,枯水期项次合格率明显高于丰水期,差异有统计学意义(χ2=117.71,P<0.001),主要不合格项目为菌落总数、游离余氯、总大肠菌群、浑浊度、耐热大肠菌群等13项。结论泗洪县农村集中式供水存在诸多安全问题,实施区域供水后得到明显好转;建立长效水质监测机制是保障农村饮水安全的重要举措。

Objective To grasp the quality of drinking water and its dynamic changes in the water quality of all centralized water supply in Sihong County, so as to provide the references for the guarantee of drinking water safety. Methods According to the standard test method of drinking water and the hygienic standard of drinking water, the water quality of all centralized water supply in this county was tested and evaluated. Results A total of 1 529 water samples were tested,and1 189 were qualified and the qualified rate was 77.76%. There was no significant difference between the qualified rates of water and end water(χ2=0.67, P>0.05). The qualified rate of water samples in the dry period was significantly higher than that in the period of abundant water(χ2=34.66, P<0.001). The main unqualified items were total colony, free residual chlorine, total coliform group, turbidity, heat coliform bacteria, and so on(totally 13 items). Conclusion There are many security problems in the rural centralized water supply in this county, butafter the implementation of regional water supply, the status has been obviously improved. It is an important measure to ensure the safety of rural drinking water by strengthening the protection of regional water supply sources, strengthening the supervision of water supply units, and establishing a long-term water quality monitoring mechanism.