The research article A drug use survey among clients of harm reduction sites across British Columbia, Canada, 2012 notes that BC has an established network of more than 300 harm-reduction supply distribution sites. 

Prior to 2012, knowledge about high-risk drug use was based primarily on data from two major cities, Vancouver and Victoria. To obtain more comprehensive data, a province-wide survey was conducted through the existing HR supply distribution network in 2012. 

Regional differences in drug use were identified, informing HR planning to improve health in this marginalized population. A mixed-methods approach was used to evaluate the implementation and outcomes to refine the survey tool and process.