Toward the end it briefly discusses a possible solution - expensive injection of water into aquifers that might have the side effect of triggering earthquakes like fracking for petroleum or some types of geothermal - there’s no winning.

It has more possible side effects than just earthquakes (not my expertise in a geological stable country). One such side effect of mixing two types of groundwater is the potential to release minerals in the geological medium that can be above beneficial use criteria (and ultimately contaminate the groundwater). There is a USGS program called PHREEQC that is used for this specific type of modelling.