Early on we tried using sea water for cooking things -- rice, pasta etc -- and it is WAY too salty for this use. If the math in post 38 is correct (and it looked ok to me), a litre of water would have the equivalent of around four teaspoons of salt
in it! This is a LOT more than one adds to fresh water for cooking these things... yuck!
But, I surely don't worry about the contaminants in offshore
seawater after boiling... well, when I get through worrying about meteor strikes, I might take up this issue!