The Lake Carriers' Association reports that limestone shipments from U.S. ports decreased 27.5 percent compared to April 2025 to 1.1 million net tons. Loadings were also below the month's 5-year average by 35.4 percent.

Year-to-date, the U.S. limestone trade stands at 1.2 million tons, a decrease of 26.6 percent from last year and 31.9 percent below the 5-year average.

Canadian data is not available. As of April 2026, Canadian ports are no longer supplying information regarding limestone shipments.

Source: Lake Carriers' Association

U.S. Great Lakes limestone trade was down 27.5 percent in April