An Analysis of The Distribution of Arsenic Groundwater in Northern Suburbs of Zhengzhou, China

With the water supplies shortage and the change of national standards for arsenic requirements from 0.05 mg/L mentioned to 0.01 mg/L, a investigating for 72 water Wells in zhengzhou northern suburb has been far-reaching significance and urgent to clarify the situation of arsenic overweight. Firstly, the main reasons which lead to the arsenic pollution by natural sources or human activity have been demonstrated briefly. Then the monitoring history records for source Wells of arsenic levels excessive have been analyzed, by which a arsenic distribution map for the north suburb Wells has been painted. Furthermore, based on the map, sampling tests for typical Wells have been carried out simultaneously. Through the comparison, it is concluded : type C Wells whose depth is between 270.84 to 341 meters have no arsenic overweight. But type A and B whose depth is between71.7 to 92 meters has a serious arsenic overweight,in which the highest arsenic is 0.487 mg/L. at last, a new suburb Wells arsenic level distribution map has been drawn which provides a reliable basis for investigation on migration transform rules of arsenic in the groundwater, establishment of scheduling solution for water source of the Wells and rigging new wells in the northern suburbs.