San Pasqual Valley

Source: CA DWR

San Pasqual Valley


  • Basin Name
  • San Pasqual Valley
  • Basin Number
  • 9-010
  • SGMA Basin Priority
  • Medium
  • Critically Overdrafted
  • No
  • Hydrologic Region Name
  • Southern California
  • Counties
  • San Diego


Located in California’s South Coast hydrologic region, the San Pasqual Valley is 3,498 acres in size. This Medium priority basin is home to an estimated 121 people (2010 value), which have been at a rate of 21.48.

San Pasqual Valley is a(n) basin with approximately 61 wells, of which approximately 3 are water supply wells. Groundwater accounts for approximately 100 percent of the basin’s water supply.

Source: CA DWR
Source: CA DWR

Basin Notes

2003: Bulletin 118 basin description

2014: CASGEM basin prioritization – medium. Comments: Nitrate problems are widespread (B‐118). TDS is also knownto be high in places. During dry years, the basin has experienced water level declines up to 20 feet in one year per GWMP.  2006 Farmland Mapping Data indicate irrigated acreage is 2,691 and quick GIS estimate by SRO indicates irrigated acreage is at least 2,100 acres.

2015: San Pasqual Groundwater Management State of the Basin Report Update

2018: Draft basin priority – medium

Note: San Diego County  basin page

2018 Final basin prioritization: Basin priority is unchanged at medium priority.

GSA Information

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