Nearly one in five American workers tested positive for drug use in long-term screenings last year, driven by a rise in cannabis consumption that is forcing companies to reevaluate their hiring practices.
According to new data from Quest Diagnostics, 19.1 percent of workers screened via hair analysis in 2025 returned a positive result, representing a 46 percent increase from 2021. Marijuana accounted for 52.5 percent of those positive hair tests.
