[caramelcustard]

I agree on that and i didn't take a whole lot of things into account. In fact, i'll add up another aspect: making a communuty dependent solely on a desalinated water transported either by pipe or vehicles of any kind from far away, while in theory resolves one problem, introduces several extra dependencies on the operators of the supply chain and potential risks associated with fuel prices, waste containment, prices of chemicals used, etc.

"That's to provide for coastal cities..." which is closer to actual viable application, provided that those cities have a backbone to rely on in case the supply chain slows down for whatever reason.

"...Improve the technology? Lower the level. Until it's bone dry. And then what?" Yeah, sounds pointless, i understand your point now.