Tackling what promises to be a controversial issue, Gov. Gavin Newsom proposed a tax on drinking water Thursday to help disadvantaged communities clean up contaminated water systems. Newsom’s plan for a “safe and affordable drinking water fund,” included in the new governor’s first budget proposal, attempts to revive an idea that died in the Legislature last year. A McClatchy investigation last year showed that at least 360,000 Californians rely on water that does not meet state standards for toxins. McClatchy also found that 6 million Californians have water providers that have violated state standards at some point since 2012.