From an engineering point of view decent water may be overkill. Just send shitty water down the pipes and filter it on premises. Putting to one side “ooh that s

From an engineering point of view decent water may be overkill. Just send shitty water down the pipes and filter it on premises. Putting to one side “ooh that sounds disgusting / what poor people do” emotions, is there any downside? Probably the main one is the cost of RO but if that cost can be got down it might work.