Sacramento Valley – Colusa
- Basin Name
- Sacramento Valley – Colusa
- Basin Number
- SGMA Basin Priority
- Critically Overdrafted
- Subject to SGMA
- DWR Region & POC
Northern Region Office
- Number of Wells
- Hydrologic Region Name
- Sacramento River Hydrologic Region
- Colusa, Glenn, Plumas, Tehama, Yolo
Located in California’s Sacramento River hydrologic region, the Sacramento Valley – Colusa is 705,170 acres in size. This Medium priority basin is home to an estimated 43,827 people (2010 value), which have been at a rate of 23.68. Sacramento Valley – Colusa is a(n) basin with approximately 5972 wells, of which approximately 86 are water supply wells. Groundwater accounts for approximately 32.1 percent of the basin’s water supply.
2014: Basin prioritization – medium. Comments: Severely declining GW levels along the west-side of Glenn Co. Moderately declining GW levels in the Capay area. High TDS shallow aquifer in Maxwell- Williams area.
Increase in housing development along I5. GW-SW interaction is important to maintaining waterfowl refuges. Area is being highlighted as solution area for Delta outflow issues…proposed increase in CU and GW pumping.
2018: Priority – high
Per 2018 draft basin prioritization: Groundwater-related transfer “Type A” in which local groundwater is pumped to compensate for exported supply
Butte County basin boundary/consolidation request for Colusa and the Wyandotte Creek 5-021.69, Corning 5-021.51, Vina 5-021.57, West Butte 5-021.58, East Butte 5-021.59, Sutter 5-021.62 subbasins pending