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宁夏灌溉回归水指灌溉农业土壤深层渗滤水、农田尾水、渠道渗漏水、退水及少量的工业废水和城镇生活污水，年排量３０～３５亿ｍ３。对灌溉回归水２０种物质含量的评价表明，它属无毒有害型淡水。采取与渠水（来自黄河水）掺灌或轮灌对作物生长无不良影响，也不会引起土壤盐碱化，可大胆开发利用。
Irrigation irrigation in Ningxia refers to the irrigation of agricultural soil deep percolation water, farmland tailings, canal seepage water, backwater and a small amount of industrial wastewater and urban sewage, the annual displacement of 30 to 3.5 billion m3. The evaluation of the content of 20 substances in return water for irrigation shows that it is a non-toxic and harmful freshwater. Taken with the canal water (from the Yellow River water) doping irrigation or rotation on the growth of crops without adverse effects, it will not cause soil salinization, can be bold development and utilization.