Ground water pollution can be caused by chemical spills, road salt, pesticides, fertilizers.
Groundwater pollution also described as groundwater contamination happens when pollutants are discharged to the ground and make their process down into groundwater. This type of water pollution can also happen commonly due to the appearance of an insignificant and unwanted component, contaminant or contamination in the groundwater, in which event it is more likely related to as contagion rather than pollution.