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Ground Water Basins

This data was acquired from the Integrated Water Resources Information System (IWRIS), hosted by the California Department of Water Resources(DWR). The Bulletin 118 Groundwater Basins shapefile was downloaded, projected to the CCS83 Zone 5 (ftUS) Map projection and clipped to the Los Angeles County Boundary for internal Los Angeles County use.It is highly recommended that users of this data visit IRWIS’ Groundwater Information Center Interactive Map for the most current GIS data and related information. Please also visit information on Bulletin 118.

To provide information about groundwater basins for public use.

Supplemental Information:


Download Data  (This link takes you to the California Groundwater Information Center Interactive Map.)

Using GIS Data on this site

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GIS data available on this website is provided AS IS - please read the GIS Data Portal Terms of Use

Data Field Descriptions

GIS Source Information
Database Name:
Feature Class Name:
Feature Dataset Name (if applicable):
Reference Date: 2014
Accuracy: Other
Update Frequency: As Needed
Access Constraints:None

Contact Information
Francis Calasanz

County of Los Angeles
Department of Public Works
Survey/Mapping and Property Management Division
900 S. Fremont Ave
Alhambra, CA 91803

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