Just a theory, but if these are roman bath houses and they replace the aquaduct district, my guess is that they don't require an adjacent fresh water source to be built, or they are an additional district that provides amenities / growth and can act as an extra tile to connect your city and aquaduct allowing fresh water to be one tile further away.
It would make much more sense if it was an additional district like you suggest. I mean romans without aquaducts ...![]()
Just because the district is called a bath, I don't see any reason why it should not also provide the normal aqueduct?
Well the Norse definitely never took baths.
Well the Norse definitely never took baths.
Of course it will provide fresh water bonus, but it will not be called aqueduct and unlikely to look like aqueduct. Which would mean what from any perspective except pure gameplay, it's not aqueduct.