Characteristics of Water Pollution and Evaluation of Water Quality in Subsidence Water Bodies in Huainan Coal Mining Areas, China

Figure 4

The content of Fe (a) and Mn (b) at each sampling point in the Huainan coal mining subsidence water bodies. (The standard limits of Fe and Mn in the figure refer to the standard limits of supplementary items of centralized surface water sources for drinking water.)

(a)

(b)