Abstract:The hazardous waste disposal plant in Chongqing was taken as the main research object, and the concentrations of As, Cd, Al, Cu, Zn, Hg, Pb, Cr, Ni and Fe were determined, the Nemerow index and groundwater environmental capacity assessment index were used to analyze the pollution characteristics of heavy metals in groundwater. The health risks of heavy metals in groundwater of the study area are explored using the health risk assessment model by Monte Carlo simulation. The results show that the factors detected in August are more than those in May, and the exceedance is mainly concentrated in August. The Nemerow index and capacity evaluation index show that, the pollution level of heavy metals in groundwater in August is generally higher than that in May, and Al is the main polluting element; The pollution level of 5# site is the highest, and the other sites are pollution-free. The health risks assessment of heavy metals show that, drinking water is the main exposure route to non-carcinogenic health risks, which are higher for children than for adults; The carcinogenic health risks index for both children and adults are within acceptable limits, but the carcinogenic health risks for children is higher than for adults. The sensitivity analysis shows that, the sensitivity of Al, Pb and average daily drinking amount (IR) rank the top three among non-carcinogenic risks, and the sensitivity of As is the highest among carcinogenic risks. In general, Al and As are the main factors affecting human health risks.