Ultrafiltered Milk Sparks a U.S.-Canada Trade Battle

The dispute over the protein product, used primarily for making cheese, could have ripple effects in global dairy markets

U.S. dairy farmers and processors in Wisconsin, New York and Minnesota have been hurt by a newly adopted Canadian pricing policy that encourages Canadian dairies to buy certain types of milk products domestically. The specific product in the trade dispute is a milk-protein concentrate called ultrafiltered milk that is used primarily in cheese-making to increase yields.

In 2016, the U.S. exported $102 million in ultrafiltered milk to Canada, according to the U.S. Agriculture Department. But industry observers estimate that exports have dropped to near zero since February, when Canada created a nationwide dairy classification that lowered the price of Canadian milk used to make ultrafiltered milk.