Bulletin 118
Groundwater Information Center Groundwater Basin Maps and Descriptions Hydrologic Regions of California: San Joaquin RiverBasins and Subbasins of the San Joaquin River Hydrologic Region
To access only the basin and subbasin descriptions for this Hydrologic Region, click on the individual basin/subbasin number below. To view a map of basin and subbasin boundaries and download individual or all basin and subbasin descriptions for this Hydrologic Region, go to DWR's Integrated Water Resources Information System (IWRIS) web site. IWRIS is a GIS-based web application that allows the user to access, query, integrate, and visualize different sets of data. For the instructions on how to view groundwater basin and subbasin maps, and download basin and subbasin descriptions, click on the How do I use IWRIS? link.
Basin/subbasin Basin name
5-22 San Joaquin Valley
5-22.01 Eastern San Joaquin
5-22.02 Modesto
5-22.03 Turlock
5-22.04 Merced
5-22.05 Chowchilla
5-22.06 Madera
5-22.07 Delta-Mendota
5-22.15 Tracy
5-22.16 Cosumnes
5-69 Yosemite Valley
5-70 Los Banos Creek Valley
San Joaquin River Hydrologic Region Map
If posted PDF files are not in an accessible text based format, please request an accessible version via the Comments and Suggestion page.
If you still need assistance, contact the DWR Webmaster.