We get our water via three 'holy' springs that the banjar distributes to everyone via a piped and metered system. So we pay, though as a private house, not much. Our rather 'progressive' banjar, at least environment-wise, doesn't allow private wells. A neighbour had the water tested by Quantum and was told that not only was it perfectly safe to drink, it had a better mineral profile than Aqua.. Still, the Javanese workers building our place schlepp the 20 kg galons on their motorbikes because from long history they don't trust centrally piped water.
Our plan is to use a filter connected to the clean water storage tanks, and for drinking to use a reverse osmosis dispenser that looks just like the normal galon dispensers. Better safe than sorry