I will never understand why people think we're ever going to run out of water on this planet. Over 70% of the surface is covered in it, and basic chemistry will tell you that when O2 and 4H are present, they will combine into water. So unless we're somehow consistently splitting hydrogen and oxygen atoms for several billion years, or are otherwise removing water, oxygen, and hydrogen from the planet, we will never run out of water.

Clean, drinkable water, on the other hand, is harder to come by, and for some reason, companies have decided desalination plants and other purification systems are just not worth investing in to provide clean drinking water for millions of people around the globe. Something about "what's in it for me," I think they said.