Valley type landfill is the major landfill type in southern China. Hence, it is of great practical significance to analysis the characteristics and sources of the contaminants and assess the health risks of groundwater in the vicinity. A case study was carried out in one of the landfills in Changsha, 32 groundwater samples were collected from 4 sampling wells in both rainy and non-rainy seasons, from which BOD5, CODCr, F-, NH3-N, TN, Hg, Fe, Mn, Ni were tested. F value comprehensive water quality evaluation method was used to evaluate water qua...