经对呼和浩特盆地西部深层水１０００ｋｍ￣２、浅层水６００ｋｍ￣２范围内进行水质检测分析，发现其深、浅两层地下水均富砷，浅水有１８．８％、深水有４０．９％的水样砷含量超过国家饮用水卫生标准。测得水体总砷中以三价砷为主。溶解氧含量低，铁、锰离子为痕量，硫酸盐、亚硝酸盐氮含量也均低，同时有低硒、高氟现象，提示该地区为富含有机质的强还原环境，有利于砷的迁移富集，对饮水型砷中毒起着促进作用。 The water quality analysis and analysis of 1000km ~ 2 deep water and 600km ~ 2 shallow water in the western part of Hohhot Basin showed that the groundwater in both deep and shallow groundwater was rich in arsenic with 18.8% of shallow water and 40.9% of deep water Watery arsenic content exceeds the national drinking water health standards. The total arsenic in the water was mainly trivalent arsenic. Low dissolved oxygen content, trace amounts of iron and manganese ions, low sulfate and nitrite nitrogen content, and low selenium and high fluoride, indicating that this region is a strong reduction environment rich in organic matter and is good for arsenic Migration enrichment, drinking water arsenic poisoning play a catalytic role.