GEOLOGY

Detailed explanation-1: -It is easier and cheaper to clean up groundwater than to prevent pollution. Cleaning water is not easy. Cleaning groundwater is especially difficult.

Detailed explanation-2: -Answer and Explanation: Groundwater pollution is hard to clean up because this water is not easily accessible since it is located underneath the Earth’s surface.

Detailed explanation-3: -If we compare an organic pollutant in groundwater to one in surface water water, groundwater has fewer microbes to digest organic pollutants, less oxygen no sunlight and surface from which organic pollutant can evaporate. Especially in slow moving groundwater, pollutants can persist indefinitely.

Detailed explanation-4: -While, Groundwater is water the contained in or by a subsurface layer of soil or rock. It commonly contains less contamination than surface water because the rock tends to act as a filter to remove some contaminants. It is called as hard water due the presence of high mineral content.