The Government Accountability Office (GAO) has compiled into single report various long-range emerging threats to the U.S. independently identifed by the Department of Defense, the Department of State, the Department of Homeland Security, and the Office of the Director of National Intelligence. GAO grouped the threats into four broad categories, which include adversaries’ political and military advancements, dual-use technologies, weapons, and events and demographic changes. There are threats within each of these categories that could have direct impacts on water and wastewater utilities. These threats include terrorism, the internet of things, drones, weapons of mass destruction, and infectious diseases. Although none of these threats are new, advancements in technology and an evolving geopolitical environment, among other changing conditions, can lead them to represent greater threats than before.