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Historical Yolo County subbasins-Bulletin 118

Historically, there were four groundwater subbasins within Yolo County as defined by DWR’s Bulletin 118: Yolo (5-21.67), Colusa (5-21.52), Solano (5-21.66), and Capay Valley (5.21-68) subbasins (see the figure below; 2003).

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