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The California Department of Water Resources (DWR) has designated the Castac Basin as very low priority.  The Sustainable Groundwater Management Act of 2014 (SGMA)  “authorizes and encourages” basins designated as very low priority to be managed under a Groundwater Sustainability Plan (GSP). The Castac Basin Groundwater Sustainability Agency (GSA) has decided to proactively pursue groundwater sustainability by developing and implementing a GSP.

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