There's almost nowhere that you don't need to care about ground water use. Acquifiers are mostly ancient systems that were at equilibrium before humans started

There's almost nowhere that you don't need to care about ground water use. Acquifiers are mostly ancient systems that were at equilibrium before humans started pumping from them. Any use of groundwater is potentially destabilizing the equilibrium. What you said is true of surface water, however: there where you need to seriously limit its use and others where you don't need to care. Note, however, that even an island as famously wet as Great Britain in recent years has faced water shortage issues, not because the total precipitation across the whole island is too low, but because it falls in the "wrong places".