The Otay Water District recently began using drones to assist district personnel with water-facility inspections. The district, which distributes water to more than 225,000 customers in southeastern San Diego County, is using the drones primarily to survey its reservoirs, pump stations and a recycled water treatment plant, according to a news release. “The District’s use of drone technology is a reflection of its continued process improvement philosophy to conduct efficient maintenance operations, improve the safety of its workers, and ultimately deliver greater value to its customers,” the release stated.