Sewage Screening Turns Up Surprising Pot Data: Cannabis Weekly
- Montreal urine levels indicate much higher use than expected
- Haligonians pee out the most cannabis; Edmonton lags the rest
This article is for subscribers only.
When it comes to cannabis, the proof is in the peeing.
Canada’s national statistics agency has been collecting and testing municipal wastewater samples from five cities for traces of cannabis to gauge actual usage of the now legal drug. The results are surprising: In some cases they contradict other Statistics Canada data on pot use, while shedding light on the potential size of the black market.