The new person in charge of delivering water to one in 17 Americans has two big goals: seeing through a controversial public works project to build two new California water tunnels and ensuring her agency is represented by a more diverse group of people. Gloria Gray became chairwoman of the Metropolitan Water District of Southern California on Jan. 1 and made history, though not for the first time. She will be the first African-American and second woman to head the board of directors in the 90-year history of the state’s southern zone, the nation’s largest treated water supply district. It delivers water to 26 public agencies that supply water for 19 million Californians.