2011年河南省南阳市农村集中式供水现状分析

目的了解河南省南阳市农村集中式供水水质卫生状况，为改善农村饮用水卫生安全工作提供依据。方法选择有代表性的230处农村集中式供水工程进行调查，并按照《生活饮用水标准检验方法》（GB／T5750—2006），于枯水期和丰水期分别采集并检测其出厂水和末梢水水质，对监测结果按照《生活饮用水卫生标准》（GB5749—2006）进行分析、评价。结果230处工程中，水源类型以地下水为主，占90．87％，检测的920份水样中，水质总合格率为57．72％，枯水期水质好于丰水期，以地下水为水源的水质好于以地表水为水源的水质，对水源水完全处理和仅消毒处理的水质好于经沉淀过滤和未处理的水质，单项指标检测以总大肠茵群和茵落总数合格率较低，分别为69．35％和84．24％，消毒剂余量合格率仅为39．94％。结论农村集中式供水工程建设和管理不完善，水质合格率较低，微生物超标和消毒剂余量不足是主要原因，存在一定的安全隐患，应加强建设和管理，以保障农村饮水卫生安全。

Status of Rural Central Water Supply in Nanyang in 2011

Objectives To understand the current state of rural central water supply in Nanyang, and provide scientific evidence for improving the safety of rural drinking water. Methods Selecting 230 central water supply sites of the Rural Central Water Supply Project in Nanyang and monitoring the quality of water during the dry and wet seasons in 2011. The detected data were analyzed and assessed. Results In 230 sites of the project, the main water source was underground water from deep well, the qualified rate of 920 water samples was 57.72% , the quality of water in dry season was better than that in wet season, underground water was better than surface water, completely treated water or water treated only by disinfectants was better than the water treated only by precipitati- on, filtration or untreated. The qualified rate for the total counts of coli form was 69.35% , for the total number of colonies was 84.24% and for residual disinfectants was 39.94%. Conclusions The construction and management of sites in the Rural Central Water Supply Project in Nanyang were insufficient, the qualified rate of water samples was low, the main unqualified indices were residual disinfectants and microbiological indices. Certain hidden dan- gers were existed, construction and management should be strengthened in order to protect the safety of drinking water in rural areas.