California Water Allocation Increases to 31 Percent
Contractors and growers can now access more surface water to help manage local groundwater reserves this fall.
Updated on Oct. 27, 2026 in Agriculture
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The Bureau of Reclamation has raised water allocations for south-of-Delta contractors to 31%, up from the 28% announced in May. This increase provides additional surface water for farmers in west Fresno County to help manage groundwater levels.
Why it matters
Higher surface water availability allows growers to reduce reliance on groundwater pumping, a critical shift for compliance with the Sustainable Groundwater Management Act and the preservation of long-term water reserves.
The Bureau of Reclamation raised the water allocation for south-of-Delta contractors to 31% from the 28% mark set on May 19. This adjustment aims to support irrigation needs across the Central Valley Project service area.
The players
Bureau of Reclamation
A federal agency under the U.S. Department of the Interior responsible for managing water infrastructure, irrigation, and power supply across the Western United States.
Westlands Water District
The largest agricultural water contractor in the Central Valley Project, serving growers across the western region of Fresno and Kings counties.
The details
The Bureau manages the Central Valley Project and adjusted the allocation after identifying better-than-expected supply conditions in regional reservoirs. By increasing surface water flow into the delivery system, growers in areas like Westlands Water District can offset groundwater extraction requirements. This operational shift helps operations align with mandates under the Sustainable Groundwater Management Act while extending reserves for future dry seasons.
Timeline
May 19, 2026: Original allocation amounts were announced.
October 27, 2026: Bureau of Reclamation announced the increase to 31%.
December 2026 – February 2027: Expected arrival of El Niño conditions.
Market Landscape
This allocation increase follows the pattern of using variable surface water supplies to meet the groundwater sustainability goals mandated by the Sustainable Groundwater Management Act. It aligns with historical efforts to preserve aquifer levels by prioritizing surface water when reservoir storage exceeds baseline forecasts.
Operators in the Central Valley Project service area should adjust their irrigation planning to account for the additional 3% in surface water access. The shift to increased surface usage is a strategic hedge against future groundwater restrictions and helps maintain operational compliance in drought-prone regions.
The takeaway
Increased surface water allocations offer a temporary reprieve for growers managing tight groundwater limits under state law. Operators should monitor reservoir levels heading into the 2027 water year, as El Niño conditions projected for early 2027 could shift future availability and supply planning.
Further reading
For broader trends on state water management and resource policy, see California Agriculture.
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