Livermore Valley

Statistics

Basin Name

Livermore Valley

Basin Number

2-010

SGMA Basin Priority

Medium

Critically Overdrafted

Hydrologic Region Name

San Francisco Bay

Counties

Alameda, Contra Costa

Adjacent Basins

SUNOL VALLEY 2-011, San Ramon Valley 2-007, ,

At-A-Glance

Located in California’s San Francisco Bay hydrologic region, the Livermore Valley is 69,567 acres in size. This Medium priority basin is home to an estimated 196,838 people (2010 value). It has approximately 755 wells, of which approximately 29 are water supply wells. Groundwater accounts for approximately 30.83 percent of the basin’s water supply.

Source: CA DWR

2003: Bulletin 118 basin description

2014: Basin Prioritization comments: Some areas have boron concentrations exceeding 2 mg/L (B-118 & Sorenson et. al. 1985).

2016: December – Alternative to Groundwater Sustainability Plan submitted to DWR

2018: Basin Prioritization comments:

1) Declining groundwater – CASGEM/WDL/GWIDS: Stable hydrographs. Source: DWR 2) Protecting the Groundwater Basin’s levels: The Valley’s main groundwater basin has an estimated storage capacity of 250,000 acre-feet (an acre-foot is about 326,000 gallons, enough to supply two households per year). To prevent overpumping, the basin is cooperatively managed by Zone 7 and its retailers so that, even during multiyear droughts, groundwater levels do not drop below historic low levels of 130,000 acre-feet. Source: Zone 7 Water Agency

2018: Final Basin Prioritization: Medium.

2019: March – Annual Report for the Sustainable Groundwater Management Program 2018 WY

July 17 – Alternative to GSP approved by DWR

2024: June 27 – Periodic update of GSP earns DWR approval