This matter has been laboured before.
Should you need fresh/stilled water for daily normal human consumption during your trip, you can simply bring it along in a container from home, or buy as much as you like at the shops in the park. They carry large stocks.
I would however like to differ with a general feeling that the water in the KTP is just about undrinkable . . . . and even being called ‘gnu piddle’ recently on the Forum. I do agree that drinking the brackish water 'straight from the tap' will give anybody (that hasn't tasted it before) one hell of a jolt first time around . . . . . and with your body not being used to the water in this format, it may very soon result in an upset tummy.
However, on this fact only, do not discard the water totally, because it has another unique quality . . . . resulting that we must be the only people in the world that regularly takes a 5/10 litre container of the water home when we leave the KTP !
This brackish water when boiled, and with its higher than normal salty contents, makes the best early morning coffee . . . just make sure that you use quality ground coffee . . . and not the 'plastic' instant stuff.
A friend of ours (with the 'wors' in hand on pic 47,
www.reddune.info ) relishes in his 2/3 glasses of this water directly from the tap every day, because he grew up with it.
. . . and surely, there must be other Forumites as well . . .we must respect them.
There is an old saying . . “that the Kgalagadi will only reveal itself to the one that visits it with an open and susceptible mind ". Once you reach the stage when city habits and comforts are not being compared to the small and simple things that the KTP offers . . . only then will you reap the value of this beautiful part of the world.