 Groundwater flow in the subbasin is generally from southeast toward the northwest or north, corresponding to the slope of the regional terrain and water table surface.Uncontained shallow groundwater occurs within of the surface, while deeper confined water has levels that occur at various depths from to below the surface.Water quality in the subbasin is generally fair with regard to sodium bicarbonate and magnesium bicarbonate, However, the trend in adverse water quality due to total dissolved solids indicates unpotable conditions may exist as early as 2020 due to overpopulation of the Livermore-Amador Valley by humans and associated discharge of salts to the groundwater.