Causes for ground water pollution are: *Improper on-site disposal of wastewater from domestic holds as well as from industries *Over extraction of ground water in coastal areas causing intrusion of sea water into ground water acquifer *Removal of top soil for construction activities, quarrying of minerals, etc. *Paving ground surfaces preventing rain water to percolate into ground water acquifer and thereby prevention of dilution of pollution in ground water *Improper sealing of wastewater treatment plants without properly determining the permeability of soil strata
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.