Why must limits be placed on the pumping of groundwater in some places?

Limits on groundwater pumping are necessary in some places to prevent overexploitation and depletion of the aquifer. Excessive pumping can lead to decreased water levels, sinking of land (subsidence), saltwater intrusion into freshwater aquifers, and diminished water quality. Implementing limits helps to ensure sustainable use and availability of groundwater for current and future needs.