I live in the country. My water is from a well and when the house was built, they did it right. Water pump is on the opposite side of the house as the septic tank.
I would guess over 200 feet apart, plus the well is much deeper.
The water just about has to be pure but just to be certain, all drinking water is boiled then filtered. Not a big deal except I have to replace the filters maybe every 3 months.
You boil your well water?