The bottom line on water... We are never going to run out of it... Period!
All the water we have, is all the water we will always have and always have had. It gets recycled over and over and over again... Even the water expelled by astronauts comes back to earth... And the cycle continues. Water doesn’t disappear... It changes form from ice, to liquid, to steam, etc... But it does not go anywhere and it never ‘disappears’ and never has... It’s always there.
People who worry about water are misinformed.
Well all it takes is governmental abuse of water reserves, just ask California!