Abstract: Water quality is an important focus of water resources development and utilization, and zaodu river water resources development plan, Chongqing City, a comprehensive monitoring of the River, from upstream to downstream, the principal mining sites, important tributaries converge, town reach specific locations has laid the monitoring section of, and in accordance with the environmental quality standards for surface water(GB3838-2004) monitoring, water quality monitoring results show that part of the monitoring section there are different degrees of iron and manganese concentrations exceeded, and concentrated in 4~8months(flood) each year, through the analysis of inter-water quality monitoring in iron and manganese exceedances and with various other chemical components correlation, along During the year the monthly research process and changes in concentration trends, the basin geological environment, obtain(1) between the iron and manganese with good correlation between the two companions; (2) ferromanganese mainly from the Permian strata in particular two Permian statistically Coal Seam mine drainage and other major conclusions, and proposed a reasonable set of water intake and mine drainage treatment measures suggested terms of reference for the relevant.