San Joaquin Valley – Modesto
Statistics
- Basin Name
- San Joaquin Valley – Modesto
- Basin Number
- 5-022.02
- SGMA Basin Priority
- High
- Critically Overdrafted
- No
- Hydrologic Region Name
- San Joaquin River
- Counties
- Stanislaus
At-A-Glance
Located in California’s San Joaquin River hydrologic region, the San Joaquin Valley – Modesto is 245,253 acres in size. This High priority basin is home to an estimated 292,341 people (2010 value). It has approximately 4296 wells, of which approximately 197 are water supply wells. Groundwater accounts for approximately 37.65 percent of the basin’s water supply.
Basin Notes
2003: Bulletin 118 basin description
2014: CASGEM basin prioritization – High. Comment: Water quality degradation due to industrial and agricultural practices.
2018: Draft basin prioritization – High. Comments: 1) CASGEM/WDL/GWIDS: Longterm hydrographs show groundwater level decline. Source: DWR 2) In Appendix A – Selected General Plans for the San Joaquin River Watershed, Modesto depends heavily on groundwater, but is cooperating with the Modesto Irrigation District to develop a new surface water supply that will be used to stabilize groundwater overdraft problems.
Final Basin Prioritization: High.
2022: January 22 – GSP submitted to DWR
2024: January 18 — DWR deemed GSP incomplete