What is the effect of use over utilization of ground water on water pollution?

Large populations bring with them unpermeable surfaces. Meaning that water from the surface is unable to percolate down through the ground in order to recharge the aquifer. This lessens the amount of water which is contained in the aquifer. With a large population also comes a higher demand for water. Meaning more wells and higher rates of pumping lessening the quantity even more. Basically death and destruction once it runs out. its has bad effects