This is a problem for many ...

This is a problem for many countries.  Authorities need to regulate how much is abstracted (and by who) along with protecting it by regulating the discharges from sewage.  The EU is waking up to the threat caused by diffuse pollution to ground waters.  On their own small septic tanks from single dwellings do not add up to much, but when you have countless ones in any single area the threat they pose is quite real.