If all the earths water is fit in the gallon jug,available fresh water would equal a tablespoon- less than half of one percent of the total. About 97% of the planets water is Sea water; another 2% is locked in the ice caps and glaciers. Vast reserves of fresh water under lie earths surface, but much of it is too deep to economically tap. WE HAVE ONLY 1% FRESH WATER.