As 5,000 students prepared for move-in day at the University of Arizona this week, the school warned they would be tested periodically for the coronavirus. One test, though, doesn’t involve a nose swab. The university is regularly screening the sewage from each dorm, searching for traces of the virus.
University of Arizona used wastewater testing to detect cases of coronavirus in a dorm – The Washington Post
Wastewater Epidemiology 