Upper Lake Valley

Source: CA DWR

Upper Lake Valley


  • Basin Name
  • Upper Lake Valley
  • Basin Number
  • 5-013
  • SGMA Basin Priority
  • Very Low
  • Critically Overdrafted
  • No
  • Hydrologic Region Name
  • Counties
  • Lake
  • Adjacent Basins


Located in California’s Sacramento River hydrologic region, the Upper Lake Valley is 7260 acres in size. This Very Low priority basin is home to an estimated 2055 people (2010 value), which have been at a rate of .

Upper Lake Valley is a(n) basin with approximately 287 wells, of which approximately 6 are water supply wells. Groundwater accounts for approximately 58 percent of the basin’s water supply.

Source: CA DWR
Source: CA DWR

Basin Notes

2003: Bulletin 118 basin description

2006: Lake County Groundwater Management Plan, Lake County Watershed Protection District

Lake County Water Inventory and AnalysisLake County Watershed Protection District

2014: CASGEM basin prioritization – very low.

2015: Supervisors, county staff discuss new state law for managing groundwater resources, Lake County News 3/25/15

Groundwater levels Upper Lake Valley – Lake County

2016: Groundwater levels Upper Lake Valley – Lake County

2018: Basin draft priority changed to high

Updated Groundwater Basin Priorities May Bring Regulation to North Bay Wine Counties, Dickenson, Peatman and Fogarty, 6/13/18

2018 Final Basin Prioritization: Basin remains at a very low priority.