State Department of Water Resources Director Mark Cowin’s commentary (“Unity needed for statewide water solutions,” Oct 29) grossly overstated our region’s reliance on the Bay-Delta. It is not our largest imported water source, accounting for only 4 percent of our region’s supply last year. Nor does the Bay-Delta provide more than half of our water in wet years, as stated in the article. Our reliance on Bay-Delta water continues to decline because our ratepayers embraced conversation and invested heavily in diversified supplies. By 2040, we anticipate less than 7 percent of our supplies will come from the Bay-Delta, while 15 percent will come from potable reuse.