求翻译：通过本次调查，对2009-2012年年均监测数据、2011全年监测数据进行分析，结果表明监测点普遍达到III类标准，少数达至IV类标准。高锰酸钾指数、砷、氨氮、总溶解性固体是主要污染物。镇子湾水井及其出厂水的总溶解性固体超标。近年来米脂县城乡饮用水中总砷、氨氮和硝酸盐含量呈上升趋势，水质逐渐恶化。随着城市化加快、城市人口快速增长、城镇污水排放量逐渐增大，由于米脂县污水处理厂处理污水量的局限性，生活污水成为影响城市水环境的重要因素之一。本次调查结果表明，米脂县城乡生活饮用水水质亟待改善。是什么意思？

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Through this survey, the 2009 - 2012 are mid-year 2011 data monitoring, data analysis, and monitoring results indicate that monitoring is generally reached III class up to standard, and a few IV class standards. Potassium permanganate index, arsenic, ammonia nitrogen, and total dissolved solids is o

Through this investigation, to 2009-2012 year yearly average monitor data, 2011 whole year monitors the data to carry on the analysis, finally indicated the test point achieved generally III kind of standard, minority reaches to IV kind of standard.The potassium permanganate index, the arsenic, the

Through this investigation, analysis of monitoring data, an average of 2009-2012 2011 annual monitoring data, results showed that universal monitoring points achieved III class standards, a small number of classes up to IV standard. , Arsenic, ammonia, potassium permanganate index of total dissolved

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