California regulators have told local agencies in western portions of the Sacramento Valley that their plans to combat groundwater overpumping need fixing, giving them six months to revise their plans before the state agency makes a final determination. The Department of Water Resources said Thursday that officials determined that local groundwater plans are incomplete in areas of the Sacramento Valley where prolonged drought and heavy agricultural pumping drew down aquifers and left residential wells dry. … This step marks the first of two approval opportunities for Sacramento Valley agencies. Groundwater sustainability plans deemed incomplete include Colusa, Corning, Antelope, Los Molinos and Red Bluff — located in the west and northern reaches of the valley.

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