【摘要】 为摸清广东东江流域村镇饮用水卫生安全现状,对惠州、河源和增城地区46个村镇的饮用水模式及水质卫生质量进行了调查分析。结果表明,东江流域村镇饮用水水质较差,水质状况堪忧,井水和山泉水是村镇居民生活饮用水的主要来源,且不具备相应的水质净化设施,水源地周边环境相对较差。水质分析结果显示,80%以上的水样pH偏低、总大肠菌群和菌落总数两项微生物指标超标严重;部分村镇饮用水中铁、锰和砷含量超标,与当地自然地理环境条件有一定关系,而井水硝酸盐污染可能主要来源于附近农田氮肥的淋失。更多还原

【Abstract】 To investigate the drinking water quality in villages of Dongjiang river basin(in Guandong Province),a total of 46 representative villages in Huizhou,Heyuan and Zengcheng districts were selected to investigate the types of water source,the wasys of water treatment and the quality of potable water.Results of investigation showed that the mountain spring water and well water were the main type of drinking water source in rural area.There was no corresponding clarification treatment for drinking water and the severe situation was observed around the water source area.The results of analysis on water quality showed that the drinking water was polluted by microorganism seriously because of the detectiong of total coliforms and total numbers of colony in more than 80% of total water samples.However,the pH value in these drinking water lower than the national standards for the drinking water quality were also observed.The content of iron,manganese and arsenic in some water samples exceeded the drinking standard of our country,which might be related with the local geographic environment.However,the contamination of nitrate in the well water could be due to the nitrogen leaching from farmland nearby the wells.In the mass,the sanitation of drinking water in villeges of Dongjiang river basin are poor and water purification should be paid more attention in the future.更多还原