Southern Arizona is no stranger to water scarcity. These communities are dependent on groundwater with many relying heavily on the Colorado River as a controversial supplemental water source. Population growth, continued drought and climate change are placing massive stress on the water supply, so the state issued a Water Innovation Challenge to identify alternative sources of water and to develop strategies for meeting the ever-growing demand. Jeff Prevatt, an employee of Pima County Arizona, and Grundfos district sales manager, Stan Coon, were sitting next to each other on an aeroplane when they hatched an idea entry for the competition: reused water as a viable source of potable water. They knew public perception and the �yuck factor,� not technology, would be the most significant barrier to acceptance of reused water, so they developed a concept for a mobile water purification system that turns water into ice-cold beer. Soon after, they formed a team that included several vendors and local utilities who worked together to design and build a mobile trailer outfitted with a complete treatment system for transforming effluent into highly treated, potable water on site. Local craft brewers could then brew the clean water into beer. �Our idea was to allow communities across the state to participate in high profile, public relations and educational events to help overcome public perception and increase the acceptance of reuse water for consumption,� said Prevatt. The team won first prize - USD 250,000 - and used the funds, together with in-kind donations from project partners, to build the mobile system. Grundfos donated pumps and pro bono expertise in water and wastewater applications. The total cost of building the trailer was just shy of USD 1 million, so donations were a big part of seeing the project to fruition. The trailer was widely successful and had far-reaching impact. Thirty-two craft breweries participated in the programme as it travelled from community to community. Its popularity in Arizona even led to a tour through Texas, Colorado, and Idaho, culminating in a presentation at the WEFTEC conference. The first of its kind, this direct potable water reuse (DPR) facility in Arizona led to the allowance of direct potable water reuse in the state. It also resulted in the creation of new rules and regulations authorize DPR as a viable alternative for increasing water supplies. �It�s highly rewarding for us to see Grundfos pumps at work, making a difference in communities,� said Rob Montenegro, Executive Vice President of Water Utility. �It�s also truly inspiring to see the change in public perception of reused water, and the growth of sustainable brewing practices among craft brewers, including the use of reused water for processing,� he adds.