Table 2 
Annual cannabis consumption by wastewater testing: Canada, 2018 (tonnes of dry flower / leaf equivalent) 

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Annual cannabis consumption by wastewater testing: Canada, 2018 (tonnes of dry flower / leaf equivalent)
Tonnes per year – Scenario AGrams per day1 – Scenario ATonnes per year – Scenario BGrams per day 1 – Scenario B
THC potency        
10% 1 900 1.2 500 0.3
12% 1 600 0.9 400 0.2
14% 1 400 0.8 300 0.2
Note(s):
Tetrahydrocannabinol (THC) excretion rate of 0.5% (scenario A), and 2% (scenario B).
Source(s):
Wastewater-based Epidemiology (5280).

Table note 1

Grams per day are defined as total estimated cannabis consumption (grams) / number of cannabis users identified in the National Cannabis Survey (4.55 million) / 365 days in a year.
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