As Colorado continues to navigate recurring drought and growing water demands, researchers and water experts are looking beyond traditional conservation measures and finding innovative ways to reuse water that would otherwise go down the drain. At the center of that effort is Water TAP, a technology accelerator located at CSU Spur in Denver, where new ideas are being tested to help communities make the most of every gallon. … One of the facility’s flagship projects is called GRETA, Colorado’s first commercial and legal graywater collection and reuse system. Water from showers and handwashing sinks on the building’s second floor is collected, treated, and reused to flush toilets throughout the facility.