God gives water freely. Man may have a right to charge to deliver it but man also has an obligation to insure those who have pollutes the waters pay for the cleanup of those waterways.
An individual is perfectly free to dig his own well or collect rainwater.
The best way to ensure cleanliness of the water ways and tributaries that are shared is to enforce property rights along the way. If the upstream folks send pollution downstream, the latter have a cause of action.
Sounds like a plan but unfortunately that does not work out. In Idaho one cannot sue a dairy operation or a farmer that is dumping so much on the land that it pollutes the springs that feed the water supply to the small valleys. The Idaho legislators took that option away from people who had clean water from those springs for generations until the dairies and mega farmers moved in.
When a chemical giant pollutes the water way it may take a generation to catch onto the damage that has been done and ten generations for the pollutants to dissipate, that is if the pollutants do dissipate at all. Soil takes more than twenty years to recover from heavy pollution from just to many farm chemicals being sprayed. Even in Arizona where the majority of the winter lettuce is grown the ground that is watered from the river brings in so many chemicals the lettuce is full of these toxins from fuel spills thirty or more years ago.
Nope regulate the major polluters to begin with and the unaware won't be poisoned by toxins. I should not be forced to hunt for an attorney to press for natural rights to be free of major polluters. It took over twenty years for this country to ban pcb's. That is too long and way too many suffered the consequences of the government's refusal to hold these giants accountable.