Hydrogeochemical Features and Genesis of Confined Groundwater and Health Perspectives for Sustainable Development in Urban Hengshui, North China Plain

Figure 10

Box plots of (a) the overall noncarcinogenic health risk due to multiple contaminants and the hazard quotient of the noncarcinogenic health risk posed by a single contaminant of (b) F⁻, (c) Mn, and (d) Fe.

(a)

(b)

(c)

(d)