A high concentration of chromium (VI) in groundwater can threaten the health of consumers. In this study, the concentration of chromium (VI) in 18 drinking water wells in Birjand, Iran, s was investigated over a period of two yearsNon-carcinogenic risk assessment, sensitivity, and uncertainty analysis as well as the most important variables in determining the non-carcinogenic risk for three age groups including children, teens, and adults, were performed using the Monte Carlo simulations technique. The northern and southern regions of the study area had the highest and lowest chromium concentrations, respectively. The chromium concentrations in 16.66% of the samples in an area of 604.79 km2 were more than World Health Organization (WHO) guideline (0.05 mg/L). The Moran's index analysis showed that the distribution of contamination is a cluster. The Hazard Index (HI) values for the children and teens groups were 1.02 and 2.02, respectively, which was more than 1. A sensitivity analysis indicated that the most important factor in calculating the HQ was the concentration of chromium in the consumed water. HQ values higher than 1 represent a high risk for the children group, which should be controlled by removing the chromium concentration of the drinking water.

地下水中高浓度的六价铬会威胁消费者的健康。在这项研究中，在两年的时间内对伊朗Birjand的18个饮用水井中的六价铬（VI）进行了调查非致癌风险评估，敏感性和不确定性分析以及确定该指标的最重要变量使用蒙特卡洛模拟技术对包括儿童，青少年和成人在内的三个年龄组进行了非致癌风险分析。研究区域的北部和南部区域分别具有最高和最低的铬浓度。604.79 km2区域中16.66％的样品中的铬浓度高于世界卫生组织（WHO）准则（0.05 mg / L）。莫兰指数分析表明，污染物的分布是一个簇。儿童和青少年组的危害指数（HI）值分别为1.02和2.02，大于1。敏感性分析表明，计算HQ的最重要因素是饮用水中铬的浓度。HQ值高于1表示儿童组的高风险，应通过去除饮用水中的铬浓度来控制。