The pilot study aims to improve our understanding of potency and contamination in cannabis available on the Australian market. It uses various methodologies to identify, and discuss the implications of, trends in cannabis potency and the presence of contaminants. The study will include: a literature review; consultations/interviews with experts on potency and contamination; an audit of websites associated with cannabis cultivation for information on potency and pesticides; growth promoters and contaminants relevant to local conditions; and a survey of users, growers and dealers addressing their knowledge and beliefs about potency and contamination.