Ground water Pollution
Groundwater contamination occurs when man-made products such as gasoline, oil, road salts and chemicals induced into the groundwater and cause it to become unsafe and unfit for human use. It can also happen naturally due to the presence of a small and unwanted constituents, contaminants or impurities in the groundwater, in which it is more likely treated to be as contamination rather than pollution. Testing of ground water pollution may focus on soil characteristics and site geology, hydrogeology, hydrology, and the nature of the contaminants. Using polluted ground water causes hazards to public health through poisoning or the spread of disease. Different mechanisms have influence on the transport of pollutants, e.g. diffusion, adsorption, precipitation, decay, in the groundwater. The interaction of groundwater contamination with surface waters is analysed by use of hydrology transport models.