Groundwater Quality Safety Evaluation Based on Health Risk Assessment

Drinking water safety is an important part in water scientific field. The traditional living drinking-water quality assessment can not evaluate wholly the impacts of groundwater quality on human body. The groundwater health risk assessment is applied to evaluate the quality of groundwater providing to an important city in west of China in this paper. The analysis shows that health risk super standard ratio caused by chemical carcinogens arsenic is 23.8% in groundwater. The cancer-making risk of Cr(VI)is in the acceptable limits. The nitrate is the major non-carcinogen chronic toxic substance for arsenic, nitrate, fluoride and manganese. Health risk assessment which assesses the carcinogen risk and non-carcinogen risk shows that 71.43% groundwater quality impacts drinking people´s health directly or indirectly. The groundwater health risk assessment analyzes the impacts of chemical carcinogen and non-carcinogen in groundwater on human body, so it can provide more deeply scientific support for quality safety and pollution control on groundwater.