Contaminants can have natural sources (e.g., arsenic or salinity) or anthropogenic sources (e.g., industrial chemicals, pesticides, or sewage effluent). Remediation activities include passive methods (e.g., monitored natural attenuation), ex-situ methods (e.g., pump-and-treat), or in-situ
methods (e.g., bioremediation or chemical oxidation).
The aim of this Special Issue of Water is to present new research contributions in groundwater contamination and remediation. This topic includes studies that eludicate critical processes controlling contaminant sources, transport, and fate in the subsurface environment, methods to
identify the concentration and extent of contaminant plumes, as well as novel approaches to predict and enhance the performance of remediation techniques. We encourage contributions on natural and anthropogenic contaminants, as well as emerging contaminants, such as manufactured nanoparticles or hydraulic fracturing fluids. The breadth of cutting-edge
research addressing these topics is substantial, so this Special Issue will not be able to include studies specifically focused on evaluating the human health impacts of contaminants...