Sacramento Valley – West Butte

Source: CA DWR

Sacramento Valley – West Butte



Located in California’s Sacramento River hydrologic region, the Sacramento Valley – West Butte is 180,429 acres in size. This High priority basin is home to an estimated 37,876 people (2010 value), which have been at a rate of 27.17. Sacramento Valley – West Butte is a(n) basin with approximately 2860 wells, of which approximately 39 are water supply wells. Groundwater accounts for approximately 38.00 percent of the basin’s water supply.

Source: CA DWR
Source: CA DWR

Basin Notes

2003: Bulletin 118 basin description

2014: Basin prioritization – high. Comment:
Declining GW levels within the City of Chico and Durham areas (30-40′ decline in mid-aquifer GW levels since 1998). High Nitrates in north and west Chico area. High density of GW contamination plumes surrounding City of Chico. GW serves as a source of underflow to Butte Creek, which has endangered spring-run salmon. GW Use based on B118-03 and 2005 Butte County Inventory data

2016: Basin Boundary Adjustment (2016 Final Modifications): Reclamation District No. 1004 – 5-021.58 Sacramento Valley – West Butte, 5-021.59 Sacramento Valley – East Butte 

2018: Draft basin prioritization – high. Groundwater level decline, subsidence comments: 1) CASGEM/WDL/GWIDS: Longterm hydrographs show groundwater level decline. Source: DWR. Report of subsidence occuring SW of Chico. Area has experieced long-term declines in GW levels. – Subsidence in California, March 2015 – September 2016, California Institute of Technology

Per 2018 draft basin prioritization: Groundwater-related transfer  “Type A” in which local groundwater is pumped to compensate for exported surface water

Butte County basin boundary/consolidation request for West Butte and the Wyandotte Creek  5-021.69, Corning 5-021.51, Colusa 5-021.52, Vina 5-021.57, East Butte 5-021.59, Sutter 5-021.62 subbasins pending

GSA Information

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