In October 2017, the Occupational Cancer Research Centre (OCRC) and Cancer Care Ontario released a report on the impact of workplace carcinogens in Ontario. The report, Burden of Occupational Cancer in Ontario: Major Workplace Carcinogens and Prevention of Exposure, focused on carcinogens that are well-established causes of cancer—​for example, solar ultraviolet radiation, asbestos, diesel engine exhaust and crystalline silica—as well as commonly known or suspected carcinogens found in Ontario workplaces. In this presentation, the first in the newly named IWH Speaker Series, Dr. Paul Demers shares the report's key findings. He also discusses policy recommendations aimed at the government, Ontario’s occupational health and safety system, employers and non-governmental organizations.