NorFalco is the exclusive distributor of sulfuric acid produced by the Canadian Electrolytic Zinc (CEZ) refinery at Salaberry-de-Valleyfield, Québec, near Montréal. Xstrata has a 25% interest in the refinery held through the Noranda Income Fund.

The CEZ refinery is one of the world's largest zinc refineries. The facility employs approximately 800 people. Its proximity to the largest zinc-consuming region in the United States and multi-model loading capabilities make it a versatile supplier by truck, rail and vessel.

In 1992, the facility became the first zinc refinery in the world to obtain ISO 9002 certification for all steps of its zinc production process. In 2003, the zinc production process and the sulfuric acid plant received ISO 9001 certification.