San Francisco-based water reuse technology company Epic Cleantec announced that a luxury residential building in San Francisco now hosts the city’s first approved and operational onsite greywater reuse system. The system can recycle up to 7,500 gallons of greywater per day, or 2.5 million gallons per year. The building, Fifteen Fifty, is owned by Related California, an affiliate of Related Companies. … The Fifteen Fifty installation captures, filters, and disinfects the greywater from showers, laundry, and rainwater. It then purifies the water and reuses it for toilet flushing. Greywater reuse can help reuse up to 95 percent of a building’s water use. For a state like California, grappling with an extended drought, this conservation can be key.