Groundwater Pollution Health Risk Assessment at Non-formal Solid Waste Dumping Sites of a Village in Baiyangdian Lake

On the basis of the analysis of the groundwater samples collected from a village located in Baiyangdian Lake, the health risk assessment model recommended by US EPA was applied to evaluate synthetically the local residents’ health risk that was caused by groundwater contamination of non-formal solid waste dumping sites. The results showed that the target contaminants of the village groundwater were NO₃^- -N, NH₄⁺ -N, Cr⁶⁺ and Hg. For exposure public of adults and kids, the health risk via dietary intake exposure path was largely higher than the health risk via dermal intake exposure path; exposure risk of adults via dietary intake was higher than kids via dietary intake and the exposure risk of adults via dermal intake was lower than kids via dermal intake. Among four kinds of target contaminants, Hg risk contribution rate was 98% and ranked the first place. Non-cancerous risk level of groundwater contamination was more than 1, so more attention should be paid to the residents’ health risk caused by non-formal solid waste dumping sites groundwater contamination.