Not heading anywhere in particular at the moment, but we were up in NE South SA and SW Qld earlier in the year and sweet water was hard to find - other than in 10 litre cardboard casks at the servos.
Roxby Downs (with its own reverse osmosis plant) had good water, but that was about it.
In a lot of places water from the taps stank like hell, but it improved after a few days in the camper tank.
Keith