You can't survive without food either. Doesn't mean you have a right to force somebody else to provide you with sustenance. It's exactly the same with water. The oceans are full of water. If you are thirsty, go distill some of it. If you claim it as a right, you are implying that somebody, through the middleman of state power, should be compelled by force to furnish you with drinkable water. That isn't right. You can't force me to carry your water.
Yes, I would argue that we have a right to food as well, since we don't have "life" "liberty" and "happiness" without it. By your argument, a middleman of state power, should be compelled to furnish me with property since it's a right. I'm not suggesting that you have to furnish me with water. I'm not suggesting that I have a right to free water, just like I'm not saying I have a right to free property, but it is a right because government can't take it away. I've never suggested what you're claiming I'm implying.
I'm simply suggesting that if water is a right government can't take it away for any reason, especially political reasons just like it can't take away property. And again, without water, we don't have "life" "liberty" and "property."