Goderich and Windsor, Ontario
Labor and operational issues severely affected mines in Goderich and Windsor, Ontario. The Goderich Mine's 2025 performance suffered from ongoing labor unrest, post-2018 strike restructuring, and equipment failures, forcing Compass Minerals to declare a force majeure and cut off private distributors. Similarly, the Ojibway Mine faced a massive regional stockpile deficit following a 192-day strike; its subsequent ramp-up was slow, with intermittent idling in early 2026. Friction between ownership and the unionized workforce has created a rigid production environment unable to surge output to meet demand.
Great Lakes / St. Lawrence Seaway
When the Great Lakes or the St. Lawrence Seaway freeze early (as seen in early 2026), shipping stops. This forces the entire supply chain onto rail and trucks, which lack the "surge capacity" to keep up. This resulted in prices in regions like Ontario and the U.S. Northeast spiking from $70 to over $300 per ton.
Quebec / New Brunswick
Mines Seleine in the Magdalen Islands, Quebec, is the sole regional domestic source, reliably producing about 1.3 million tonnes annually. However, it is logistically isolated and relies on vulnerable barge shipments due to severe winter storms in the Gulf of St. Lawrence. A significant development is the partial revival of Nutrien's Picadilly mine in New Brunswick, which began supplying salt (approximately 100,000 tonnes/month) in March 2025, providing a crucial but insufficient new volume for the Maritimes and the broader U.S. East Coast deficit.
The Mississippi River
Persistent, historic drought has crippled the Mississippi River's salt transport "superhighway" for four consecutive years. Army Corps of Engineers restrictions require light-loading barges (e.g., 25-30 barges instead of 40, with less tonnage each, restricting supply) and intermittent closures for dredging. As a low-priority commodity competing with grain and fuel, salt shipments face delays or are priced out. Consequently, delayed late-2025 salt barges left Midwest terminals with unfilled stockpiles entering winter.
New York / Pennsylvania
American Rock Salt's Hampton Corners mine in Mt. Morris, N.Y., is the primary supplier for New York and Pennsylvania. In 2025, ARS shipped 2.1 million tons by January, exceeding its entire previous season's output. Despite running 24/7 schedules and investing in new underground conveyors to boost daily output by 25%, ARS hit its physical ceiling. The mine's "hoist capacity" – the speed at which salt can be lifted from the mine floor to the surface – became the bottleneck. The company was forced to open its strategic reserves, depleting the safety stock meant for emergency scenarios.
East Coast
The East Coast relies entirely on imports for rock salt, utilizing deep-water ports like Boston to receive shipments from Chile, Egypt and Atlantic Canada. Transit times from Chile and Egypt exceed 14 days, hindering quick responses to weather changes. Furthermore, the Jones Act mandates expensive, scarce U.S.-flagged vessels for domestic salt movement, making Egyptian imports often cheaper than shipping from Louisiana, and increasing the international supply chain risk.
In 2025, the United States estimated its domestic salt production to be 40 million tons. Of this, approximately 39 million tons were sold or used, with an estimated total value of $2.6 billion. Salt was produced by 25 companies operating 60 plants across 15 states.
Kansas, Louisiana, Michigan, New York, Ohio, Texas and Utah were the primary producers, accounting for about 95% of the total U.S. salt supply in 2025.
Salt consumption increased in 2025 compared to recent years. The breakdown of salt sold or used by type was:
Deicing represented a significant portion of the total. An increase in consumption by local and state transportation departments led to an estimated rise in rock salt imports in 2025 compared with the previous year.