True.
And taxes are the labor of others. What you advocate when you claim water should be provided to all, is that all people have earned the right to have a commodity provided to them, completely irrespective of circumstances and the labor they have or have not provided. This is different than saying no one should be blocked from a source of water. I don't think you are going to find anyone - not even the most ridiculous caricature of a fat-cat capitalist - who thinks people should be blocked from resources. The common logical fallacy favored by those on the left side of the spectrum is to conflate access with provision. This is a clear example.
To illustrate the fallacy in effect, take the example of healthcare: I do not think I should pay for someone else's healthcare... and this does not mean I want the poor to die. I also do not think someone should pay for my healthcare, and this does not mean I want to go hundreds of thousands of dollars into debt and eventual bankruptcy. It also does not mean I am rich, or cruel, or stupid. It means I advocate a market based approach to solving the problem largely created when the government started putting their dirty little hands into the health system.
In the case of basic staples of life, like water, labor should be required for use, be it the price of a well and a pump, or a fair use fee for municipal services. Baring that, go down to the river and boil your drinking water. I don't care. But don't expect me or the guy next to me to pay for it because you can't provide for yourself (barring mental illness and legitimate disability).
If the air we breathe required expensive treatment and capture systems in order to provide oxygen safely, I would also advocate people get off of their ass and find a way to earn this commodity, too.