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目的了解舟山市生活饮用水中锰含量变化,为加强水质监督管理提供科学依据。方法调取2007-2011年卫生监督监测资料3 161份;采样检测2011年5月-2012年5月水质样品468份,统计分析全市生活饮用水锰含量变化趋势及现况。结果五年来全市水源水、出厂水和管网末梢水中均出现不同程度的锰超标现象,且岱山县较为严重;水源水、出厂水中锰含量随季节性变化较明显;管网末梢水中锰含量超标主要发生在供水规模较小的小型水厂供水范围内。结论通过加强卫生监管、实施城乡供水一体化工程使全市生活饮用水水质锰含量合格率上升,但岱山县锰含量超标较明显,可能与当地水文地质因素有关。
Objective To understand the change of manganese content in drinking water in Zhoushan City and provide a scientific basis for strengthening water quality supervision and management. Methods A total of 3 161 samples of health supervision and monitoring data from 2007 to 2011 were collected. 468 samples of water quality samples were collected from May 2011 to May 2012, and the trends and current status of the manganese content in drinking water were statistically analyzed. Results In the past 5 years, the municipal water source water, the ex-factory water and the peripheral water of the pipe network all showed different levels of manganese exceeding the standard, and Daishan County was more serious. The manganese content in the water source water and the ex-factory water changed obviously with the seasonality. Mainly occurs in the small-scale water supply within the scope of small-scale waterworks. Conclusion The pass rate of manganese content of drinking water in the city increased by strengthening the supervision of health and implementing the integration project of urban and rural water supply. However, the manganese content in Daishan County exceeded the standard obviously, which may be related to the local hydrogeological factors.