This week, Northwest researchers published the results of a communal drug test. Scientists from Washington and Oregon sampled sewage treatment plants around Oregon. They checked the inflows for traces of cocaine, methamphetamine, and the party drug Ecstasy.
96 communities voluntarily sent [in] a sample of their raw influent representing one day of material flowing into their wastewater treatment plants.
Methamphetamine was easily detectable in every single sewage sample.