Nice vague post...
So tell me.
Is water a right?
vs.
Is gun ownership a right?
It's important to define the basis of what further logic and reason rests upon. All reasoning begins with postulates and axioms that cannot be proven and must there for sstand on their own.
The two rights you propose are not so easily answered without setting forth some circumstance within which it is examined. And, we lack some basic axioms.
Are we discussing a Robinson Cruiso situation? O are we considering a large, complex, working societ?
I have one axiom, that of symetery. I am oligated to treat you in no better manner than you treat me and others.
Words and phrases have no other purpose than to transfer information from one person to others. If words and/or phrases are vague, then so is the information transfered. Therefore, we need to maintain the pureness of meaning to maintain the accuracy of information transfer. For example, an axiom is a truth so obvious that it does not require proof. Axioms are used to build theorems through deductive reasoning.
A 'right' as used here, is a moral or legal entitlement to have or obtain something, or to act in a certain way. Human rights are moral rights that are not necessarily legal rights. Are all people morally entitled to water for personal sustenance? Yes, without a doubt. Are all people legally entitled to water for personal sustenance? I would say yes.
Now, the hard question. Are people entitled to have someone else, or some entity, private or public, provide that water to them? Yes, no, and maybe. If that someone else, or some entity, has a government permit that provides them the sole distributorship of water to a specified area, then I would say that someone, or entity, has both a moral and legal obligation to ensure all people in that area have adequate access to water for simple sustenance.
In Detroit, for example, the city should have already established public water sources where people, who have had their water shut off for non payment, can fill their jugs and buckets for water to sustain life. They should also provide for human waste disposal, since toilets no longer flush.