Sacramento Valley – North American
- Basin Name
- Sacramento Valley – North American
- 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
- Placer, Sacramento, Sutter
Located in California’s Sacramento River hydrologic region, the Sacramento Valley – North American is 342,241.43 acres in size. This High priority basin is home to an estimated 831,374 people (2010 value), which have been at a rate of 22. Sacramento Valley – North American is a(n) basin with approximately 3853 wells, of which approximately 294 are water supply wells. Groundwater accounts for approximately 39.27 percent of the basin’s water supply.
2014: CASGEM basin prioritization – high. Comments: From B118: Elevated levels of TDS, chloride, sodium, bicarbonate, boron, fluoride, nitrate, iron manganese, and arsenic may be of concern in some locations (DWR 1997). There are 3 sites with significant GW contamination in the basin.
From B118: GW levels in SW Placer County and northern Sacramento County have generally declined with many wells declining at a rate of about one and one‐half feet per year for the last 40 years or more (PCWA 1999).
2018: Draft basin priority – high. 1) CASGEM/WDL/GWIDS: Longterm hydrographs show groundwater level decline. Source: DWR 2) Hydrographs in the Western Placer County Sustainable Yield Report 2013, show groundwater level decline. High rating due to water exports. Per 2018 draft basin prioritization: Groundwater-related transfer “Type A” in which local groundwater is pumped to allow for inter-basin diversion of surface water.
Jurisdictional basin boundary modification request by Yuba County Water Agency pending