Upper Santa Ana Valley – Temescal
- Basin Name
- Upper Santa Ana Valley – Temescal
- Basin Number
- SGMA Basin Priority
- Critically Overdrafted
- Subject to SGMA
- DWR Region & POC
Southern Region Office
- Number of Wells
- Hydrologic Region Name
- South Coast Hydrologic Region
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), which have been at a rate of 18.99. Upper Santa Ana Valley – Temescal is a(n) basin with approximately 207 wells, of which approximately 13 are water supply wells. Groundwater accounts for approximately 42.13 percent of the basin’s water supply.
2003: Bulletin 118
2014: CASGEM basin prioritization – medium. Comment: Groundwater quality impaired by nitrates and inorganics in some wells (B‐118).
2018: Draft basin priority – medium
2018 final basin priority: Basin priority remains unchanged at medium priority.