Question

Which of the following is a serious threat to underground water supplies?

A) slow recharge rate b) impermeable rock layers
c) infiltration by acidic water
d) contamination by the water table

Answer 1

The answer is D) contamination by the water table.

sources- www.groundwater.org/get-informed/groundwater/contamination.html

Answer 2

The answer is d)contamination by the water table

Step-by-step explanation:

There is a potential risk when wastewater concentrations occur in restricted areas, where the hydrogeological environment is highly conducive to infiltration such as aquifer recharge areas. Although in the processes of adsorption and attenuation of such contamination occurs in the unsaturated area, the infiltration of some substances up to the water table can form a serious threat to the next uptake.