Well.... maybe. That's a lot of capital outlay and effort, sometimes one has to drill down quite a long way to reach groundwater or aquifers. And even then you have to be careful of bio-hazards (algae, bacteria, e-coli, etc.). And if you're in the proximity downstream of an industrial plant, you also have to deal with potentially harmful pollutants like heavy metals (lethal) or chemicals. So you would also have to invest in a water purification process like distillation or reverse osmosis treatments. It's hard and expensive to do that for an individual.

I once contacted a well-digging company locally to inquire about using groundwater, and I got an estimate of a few thousand dollars, and that didn't even include SEARCHING for a viable source on my property! So I started collecting bottles of water...large and small. Be sure it's stored in BPH-free plastic and it should last a long, long time. Also you can capture rainwater in barrels, if you're prepared to boil it before drinking it.