Almost 400 water systems serving nearly a million Californians don’t meet state requirements for safe and reliable drinking water supplies. That’s according to an annual assessment released Tuesday by the State Water Resources Control Board. About 98% of Californians are served by water systems that meet state standards, but more than two-thirds of those that don’t are in communities of color and more than half are in places struggling with poverty and pollution. The report says the fix would cost billions of dollars and without more state or federal funding, most of the total may fall on local communities and well owners.