On the U.S.S. Saratoga the fresh water tasted mildly of
fuel (jet fuel, I thought, but maybe fuel oil). The solution was to drink coffee or red fruit punch (AKA bug juice), never plain water! To the ship's credit, the
galley made amazing fresh bread and cinnamon rolls, so all was forgiven.
Anyway, how about one of those fuel-eating enzyme cleaners? They remove
diesel fuel stains from clothes, concrete,
boat bilges, and so forth. They're supposed to be non-toxic.