Recent Studies

Areas listed below have been studied recently by the GAMA program.

Groundwater resources used for domestic supply studies are in green.

Groundwater resources used for public supply studies are in blue.

Western Central Valley
Map of the study area
  • Western Central Valley
  • Dates Sampled: April - July 2023
  • Depths Sampled: 70 - 520 feet
  • Data:
  • Publication:
  • Multiple. See the Studies by Location page for more information.
  • Dates Sampled:
  • Depths Sampled:
  • Data:
  • Publication:
Gilroy-Hollister Basin & Surrounding Areas
Map of the study area
  • Gilroy Hollister basin and surrounding areas
  • Dates Sampled: August – October 2022
  • Depths Sampled: 157 - 800 feet
  • Data: USGS Data Release
  • Publication:
Kern County
Map of the study area
  • Kern County
  • Dates Sampled: January - April 2022
  • Depths Sampled: 200 - 870 feet
  • Data: USGS Data Report
  • Publication:
Eastern Sacramento Valley and Foothills
Map of the study area
  • Eastern Sacramento Valley and Foothills
  • Dates Sampled: July - November 2021
  • Depths Sampled: 71 - 730 feet
  • Data: USGS Data Release
  • Publication:
Central San Joaquin Valley
Map of the study area
Coachella Valley Area
Map of the study area
E. San Joaquin Area
Map of the study area
N. Sacramento Valley
Map of the study area
Mojave
Map of the study area