Borrego Valley Groundwater Basin

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Borrego Valley Groundwater Basin

Basin Description ( 7-24 )

The Borrego Valley Groundwater Basin (Borrego Basin), shown in yellow on the above map, underlies Borrego Valley in eastern San Diego County and western Imperial County. The portion of the Borrego Basin within San Diego County extends southwest from the San Ysidro Mountains to the eastern boundary with Imperial County. The Department of Water Resources approved a  Basin Boundary Modification request in 2016, which divided the Borrego Basin into two subbasins - Borrego Springs and Ocotillo Wells. 

The Borrego Springs Subbasin, located entirely in San Diego County, is bounded by the Santa Rosa Mountains to the north and the San Ysidro Mountains on the west. The eastern boundary is represented by the Coyote Creek and Superstition Mountain faults. The southern border of the subbasin is characterized by the San Felipe/Yaqui Ridge anticline and San Felipe fault. These geologic structures compartmentalize the deep alluvial sediments in Borrego Springs from the alluvial sediments to the southeast of the San Felipe Wash, which provides a physical barrier to groundwater and stifles flow between the subbasins. This barrier reduces the effect of groundwater pumping in Borrego Springs Subbasin on groundwater storage in the Ocotillo Wells Subbasin.

The Ocotillo Wells Subbasin exists in both San Diego and Imperial Counties. This subbasin is bounded by Fish Creek and Coyote Mountains to the west. The southeastern boundary is a surface drainage divide from the Coyote Mountains northeast to Superstition Mountain. The Coyote Creek fault marks the northeast boundary of the subbasin. The Ocotillo Wells Subbasin is characterized by a relatively small population, few wells and limited groundwater consumption. 

Borrego Valley GSA (MOU between the County and Borrego Water District)

County of San Diego
Borrego Water District
Stakeholder Engagement Plan
Notice of Intent to Develop a Groundwater Sustainability Plan
Advisory Committee Bylaws

Public Review Process for Groundwater Sustainability Plan

The County and the Borrego Water District (BWD), as the GSA for the Borrego Basin, have developed a Groundwater Sustainability Plan (GSP) in compliance with the 2014 Sustainable Groundwater Management Act (SGMA) (California Water Code Section 10720–10737.8, et al.) and the Department of Water Resources (DWR) GSP Regulations (California Code of Regulations, Title 23, Section 350 et seq.). The GSP is required to be adopted by the GSA by January 31, 2020. 

SGMA does not require any public review period prior to adoption. The GSA, however, has added a 60-day public review period to ensure stakeholders and other interested parties have an opportunity to review and comment on the GSP prior to adoption.  The public review period of the draft GSP is open from March 22, 2019 – May 21, 2019 (60 calendar days).  It is available for review on this website and at the following locations:

  • Hard Copy (for on-site review only):
    • County of San Diego, Planning & Development Services, 5510 Overland Avenue, First Floor, San Diego, California
    • Borrego Water District, 806 Palm Canyon Drive, Borrego Springs, CA
    • Borrego Springs Library, 2580 Country Club Road, Borrego Springs, CA

Comments on the draft GSP must be received by the GSA no later than May 21, 2019.  Please be sure to reference the project name and send comments via e-mail or US Mail to:

County of San Diego Planning & Development Services
C/O: Jim Bennett
5510 Overland Avenue Suite 310
San Diego, CA 92123

Summary Slides

Public Meetings (Agendas will be posted at least 72 hours prior to scheduled meetings)

Information about the next regular meeting of the Advisor Committee will be posted once scheduled.

August 31, 2018 Technical Meeting

March 5, 2018 SocioEconomic Workshop/AC Meeting


Back to SGMA Page