Human health is seriously threatened by long-term intake of water with high amounts of fluoride (F−>1.0 mg/L) and nitrate (NO3−>10 mg/L). In June (Shao 2024), 91 groundwater samples were taken for analysis in Datan Town, Fengning County, Chengde City, Hebei Province. Piper diagrams, Gibbs plots, and ion ratio methods were used to analyze the hydrochemical features of the research area, and the human health risk assessment (HHRA) model was used to evaluate the health risk. The results indicate that HCO3-Ca is the most predominant hydrochemical type of groundwater in the studied area. The maximum acceptable limits for drinking water in China (1.0 mg/L and 10 mg/L, respectively) were exceeded by elevated concentrations of 15.38% of F− and 32.97% of NO3−.The formation of high-fluoride groundwater is mainly attributed to the dissolution of fluorite, whereas elevated NO3−concentrations are primarily the result of anthropogenic activities. Both F−and NO3−exhibit significant non-carcinogenic risks for adults and children. Furthermore, Cr6+ and As are identified as the primary carcinogenic contaminants in the groundwater environment of the study area, with carcinogenic risks exceeding the acceptable limits.
