Cadmium (Cd) was measured in bulk exports of Canada Western Amber Durum collected from 1992-1993 to 2019-2020 shipping years. Cd concentrations decreased by more than a factor of two over this period, from the highest annual median concentration of 0.160 mg/kg in 2003-2004 to the most recent annual median of 0.070 mg/kg for 2019-2020. Over the same time period there was no trend in Cd concentrations in bulk exports of Canada Western Red Spring wheat. The decrease in durum Cd concentrations was correlated with the decrease in production of high Cd accumulating cultivars, demonstrating the success of the Canadian breeding programme at developing low Cd accumulating cultivars, the registration system and producer support in reducing the Cd content of Canada Western Amber Durum.
Keywords: Heavy metal; cereal grain; monitoring; temporal trend.