Headline: Why districts are slow to charge market rates for water." P1: Why don’t districts pass the marginal costs of water on to their constituents? P2: HAH! Do you see what I did there? [switch constituents with customers] Me: Actually, the thing I notice is the switch from "market costs" to marginal costs. It should be obvious that "market costs" are fiction for water districts since these districts are virtually…
In this case, the government should choose the supply such that it's ecologically sustainable. So the price is the price at which that sustainable level of water usage is demanded by the market.
That would not count as monopoly pricing, which would instead set the price to maximize revenue