Even though we’ve had back-to-back wet winters, state officials say drought is still one of California’s most severe environmental threats. One Placer County city is reducing its overall water usage with the help of homeowners, businesses, and even space-based technology. Roseville is one of the most rapidly growing cities in the region, and it’s been able to accommodate all these new homes without needing any extra water. “Since 2013, the population of Roseville’s grown by 25%. Yet, water usage is down 17%,” said Sean Bigley, the City of Roseville’s assistant environmental utilities director. Bigley said the key has been conservation.