Monitoring and analyzing the contents of communities’ wastewater streams is revealing useful information for tracking the spread of the COVID-19 disease. Fulton Schools Professor Rolf Halden and his research team at ASU’s Center for Environmental Health Engineering have been undertaking similar studies to assess public health conditions for many years. Now, with the emergence of the coronavirus pandemic, the value of that work is being widely recognized and the expansion of “wastewater epidemiology” on a global scale is seen as critical to future efforts to protect against widespread health threats.