A wastewater data program the city of Tempe has used to track the spread of COVID-19 in its communities will be expanded with a $1 million grant from the Center for Disease Control to the Arizona Department of Health Services to partner with the city. ASU’s Biodesign Center for Environmental Health Engineering, directed by Fulton Schools Professor Rolf Halden, has been working with Tempe for the past few years, using wastewater-based epidemiology to gather information that can reveal public health issues. In addition to tracking COVID-19, the sewage surveillance project can also help detect other emerging health crises, Halden says.