Twice a week, mathematics professor Andrea Bruder squats in the sewage tunnels below South Hall, a mostly freshman dorm at Colorado College. She wears head-to-toe protective gear, and holds a plastic ladle in one hand and a to-go coffee cup in the other. Bruder hovers above an opening in a large metal pipe, and patiently waits for a student to flush.
That flush will flood the pipes with just enough water to carry human waste down to her ladle, then to her coffee cup and eventually to a lab for processing.
According to an analysis by NPR, Bruder’s small private college in Colorado Springs