Tacoma’s wastewater has the answers in a new cannabis study. Credit: RACHELLE ABELLAR

Tacoma’s wastewater has the answers in a new cannabis study.

Tacoma’s wastewater has the answers in a new cannabis study. RACHELLE ABELLAR

You can learn loads about someone by what comes out of their ass. Dogs know this. People who are into scatology are preoccupied with this. And it turns out that researchers from the University of Washington and the University of Puget Sound realize this, too. After studying our shit, they have discovered one clear trend in our weed habits: We’ve been consuming it a lot more since its legalization.

These local scientists took samples from Tacoma’s wastewater plants from 2013 to 2016 and then analyzed those samples for THC levels. THC is the most common psychoactive chemical found in cannabis, so measuring the quantity of THC in Tacoma’s excrement would provide data on how much pot the City of Destiny was ingesting.

Lester Black is a former staff writer for The Stranger, where he wrote about Seattle news, cannabis, and beer. He is sometimes sober.