As more extreme weather causes water to become scarcer in regions due to drought, scientists are exploring ways to recycle wastewater for irrigation and other non-potable uses. But before it can be released back into the environment, it must be free of any pathogens. The Environmental Protection Agency has awarded a $1.24 million grant to Tulane University and a multi-university research team to come up with standards for measuring viruses and other pathogens in treated wastewater for water re-use projects.