World production of salt has grown at just above the rate of population growth over the last quarter century or so—global salt production grew by 35% while world population grew by 38% between 1985 and 2007. Salt is used in many ways, in the treatment of water, in agricultural applications, as an industrial input, in deicing operations and as a spice or food additive. In the United States, food-grade salt is the smallest of the categories of salt by end use. In fact, nearly two-thirds of U.S. salt consumption annually is related to the de-icing of roadways. This makes us wonder (with a bit of tongue in cheek) whether looking at changes in the number of paved roads there are in the northern reaches of the northern hemisphere and the southern reaches of the southern hemisphere may be a better gauge for predicting future salt demand in the world.

Today’s market size is the quantity of salt produced worldwide in 1985 and in 2007, measured in millions of metric tons.

Geographic reference: World
Year: 1985 and 2007
Market size: 190.6 and 257.0 million metric tons respectively
Source: “World Salt Production,” a spreadsheet presented on the Salt Institute’s web page, available online here.