Upper Santa Ana Valley – Temescal
Statistics
- Basin Name
- Upper Santa Ana Valley – Temescal
- Basin Number
- 8-002.09
- SGMA Basin Priority
- Medium
- Critically Overdrafted
- No
- Hydrologic Region Name
- South Coast
- Counties
- Riverside
At-A-Glance
Located in California’s South Coast hydrologic region, the Upper Santa Ana Valley – Temescal is 22,964 acres in size. This Medium priority basin is home to an estimated 141,472 people (2010 value). It has approximately 200 wells, of which approximately 13 are water supply wells. Groundwater accounts for approximately 42 percent of the basin’s water supply.
Basin Notes
2003: Bulletin 118 basin description
2014: CASGEM basin prioritization – medium. Comment: Groundwater quality impaired by nitrates and inorganics in some wells (B‐118).
2016: Basin boundary modification with Elsinore 8-004, which partitioned the Elsinore Basin in two basins and aligned the boundaries.
2018: Draft basin priority – Medium
Fnal basin priority: Medium.
2022: January 27 – GSP submitted to DWR
2024: January 18 – GSP approved by DWR