The Ontario Provincial District Council (OPDC) is a certified council of trade unions made up of affiliates of the Labourers’ International Union of North America (LIUNA). The OPDC has ten affiliated local unions located throughout the Province of Ontario. Our affiliates specialize in representing construction workers, however, they also represent workers in many other industries including manufacturing, hospitality, cleaning, convention and show services. LIUNA represents workers in all sectors of the construction industry in Ontario: industrial, commercial and institutional (ICI), residential, roads, pipeline, sewer and watermain, electrical power systems, demolition, utilities and heavy engineering.