The value of water should be related to the value of life more than to the value of money.
The price or cost of water varies depending on the abundance of water and whether or not water is renewable in the place where it is uses.
The cost of water use must include both the depletion of the stock of water due to consumption but als the cost of the water pollution resulting from post-use discharge.
The unit of account for water could be that 1 liter of net water consumption = 1 water unit.
Many things associated with water and water pollution could be related to the idea that 1 liter of fresh water has a value of 1 (say).
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