Keywords: Arsenic, Biochemical oxygen demand, Bioremediation, Bottled water, Combined sewer systems, Constructed wetland, Contaminant plume, Cultural eutrophication, Excessive plant nutrient, Hard water, Heat, Heavy metal, Hypoxia, Mercury, Nonpoint source (of water pollution), Oil spill, Oxygen-demanding waste, Pathogens, Persistent organic pollutant, Point source (of water pollution), Sediment, Septic tank system, Sewage treatment plant, Sludge, Solvent, Total dissolved solids, Toxic chemical, Underground fuel storage tank, Water pollution

Summary: In this module, the following topics will be covered: 1) water pollutants and how they degrade water quality, 2) the lack of safe drinking water in some parts of the world , 3) sewage treatment 4) the difficult process to remediate groundwater pollution, and 5) solutions for the crisis involving water pollution