Halifax and Montreal Lead Cannabis Wastewater Challenge
https://commons.wikimedia.org/wiki/User:Jordiferrer
Statistics Canada released the pilot test results of its study on Wastewater-based estimates of cannabis and drug use in Canada. The yearlong pilot project between March of 2018 and February of 2019 tested municipal wastewater in Halifax, Montreal, Toronto, Edmonton, and Vancouver (representing a combined 20% of the Canadian population) for traces of cannabis and other drugs.
