Fish living downstream of wastewater treatment plants are accumulating antidepressants, opioids and other drugs of abuse in their bodies, according to a new study. Using a new analytical method they developed, a team of researchers from the University of Waterloo discovered that several substances that affect the central nervous system, including fentanyl, methadone and venlafaxine, were detected in small fish living in rivers that receive urban wastewater.

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