Uncertainty Health Risk Assessment and Regional Control of Drinking Water: A Case Study of Hanyuan County, Southwest Mountainous Area, China

Abstract

To evaluate the health risks of drinking water in Hanyuan County, 96 samples of peripheral drinking water were collected from 30 sites in the area. The samples were then analysed for physicochemical properties including Fe, Mn, NH 3 -N, , F-, Pb, Hg, As, Cr 6+ , Cd, and so on. The health risks of ten trace elements in drinking water were probabilistically assessed using the health risk assessment model and Monte Carlo simulation. On this basis, sequential indicator simulations were used to classify the health risk levels of drinking water in the region, to conduct hierarchical management and control. The results showed that except for , all other indicators met World Health Organisation standards and China’s drinking water sanitation standards. Drinking water presents a specific carcinogenic risk to adults, and the cumulative contribution of As and Cr 6+ exceeds 95%, and has a specific non-carcinogenic risk to children if the cumulative contribution of F - , , and As exceeds 90%. Grade I, II, and III non-carcinogenic risk areas accounted for 0.89%, 24.72%, and 74.39% of the total area of Hanyuan County, respectively, while grade I, II, and III carcinogenic risk areas accounted for 27.71%, 45.56%, and 26.73% of the total Hanyuan County area, respectively. Finally, according to the health risk characteristics of each control area, corresponding zoning control suggestions were proposed.

The association between perchlorate in drinking water and height and weight of children and adolescents in Southwest China: a retrospective cross-sectional study

“…According to the World Health Organization, 80% of diseases worldwide are caused by contaminated drinking water; 50% of the deaths of children around the globe are from contaminated drinking water (12). Research has shown that the health-related quality of life of children and adolescents is affected by height and weight, and children's height and weight are closely related to environmental pollution, especially drinking water pollution, and its impact is inseparable from human life (13).In this study, we quantified the specific effects of perchlorate in drinking water in children and adolescents at each age stage and found that the height and weight of children and adolescents had a dose-response relationship with perchlorate exposure in drinking water, decreased by the influence of perchlorate in drinking water, and had a statistically significant effect on the weight of adolescents aged 6, 7, and 11-14 years, and adolescents aged 11-15 and 18 years.…”