Groundwater Health Risk Assessment Based on Monte Carlo Model Sensitivity Analysis of Cr and As—A Case Study of Yinchuan City

Groundwater is an important resource for domestic use and irrigation in the Yinchuan region of northwest China. However, quality groundwater this declining due to human activities, with adverse effects on health. In order study chemical elements health, health risk drinking was calculated based actual situation China U.S. Environmental Protection Agency (USEPA) model. Moreover, sensitivity contaminant exposure water wells quantified using Monte Carlo simulation minimize uncertainty conjunction USEPA assessment techniques, aim identify major carcinogenic factors. addition, Visual Minteq used analyze possible ionic forms factors hydrogeological environment area. The results showed that mean CR values As were 2.94 × 10?0.5 5.93 dry rainy seasons, respectively, while 2018 they 5.48 3.59 10?0.5, respectively. parallel, children 2017 6.28 1.27 10?0.4, 1.17 10?0.4 7.67 indicating a considerably higher than adults. analysis Cr6+ Crystal Ball software association 0.9958 1 0.0948 0 Cr seasons 2017, 0.7424 0.5759 0.6237 0.8128 2018, Only season lower those Cr, more sensitive total risk. visual coinage model among all As, activity HAsO42? had largest logarithmic value H3AsO4 smallest value, regardless pH changes. This indicates form main factor Therefore, corresponding environmental control measures need be taken time strengthen monitoring especially HAsO42?, great significance city formulate pollution management recovery.