CA Bulletin 118 Groundwater Basins

The dataset is a feature class showing the boundaries of 515 groundwater basins and subbasins as defined by the California Department of Water Resources as last modified by the Basin Boundary Emergency Regulation adopted on October 21, 2015 and subsequent modifications requested through the Basin Boundary Modification Request Process.  Groundwater basins are represented as polygon features and designated on the basis of geological and hydrological conditions - usually the occurrence of alluvial or unconsolidated deposits. When practical, large basins are also subdivided by political boundaries, as in the Central Valley. Basins are named and numbered per the convention of the Department of Water Resources.

Data and Resources

Field Value
accessLevel public
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier 115a7d25-85c2-4046-b94f-7f88b1c14919
issued 2018-01-19T21:16:17.000Z
modified 2021-07-29T15:09:28.000Z
publisher California Department of Water Resources
resource-type Dataset
source_datajson_identifier true
source_hash 7743646fca38695c79fc540f947016f8dabad980
source_schema_version 1.1
theme {"Natural Resources",Water}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • aquifer
  • aquifers
  • b-118
  • b118
  • basin
  • boundaries
  • bulletin-118
  • california
  • california-department-of-water-resources
  • ckan
  • department-of-water-resources
  • dept-of-water-resources
  • dwr
  • geo
  • geology
  • geoss
  • ground-water
  • groundwater
  • hydrogeology
  • national
  • north-america
  • sub-basin
  • united-states
isopen False
license_id notspecified
license_title License not specified
maintainer GIS.Admin@DWR
maintainer_email gis@water.ca.gov
metadata_created 2025-11-21T07:39:49.226764
metadata_modified 2025-11-21T07:39:49.226768
notes <p style='margin: 0px;'><font color='#000000' face='Calibri' size='3'>The dataset is a feature class showing the boundaries of 515 groundwater basins and subbasins as defined by the California Department of Water Resources as last modified by the Basin Boundary Emergency Regulation adopted on October 21, 2015 and subsequent modifications requested through the Basin Boundary Modification Request Process.  Groundwater basins are represented as polygon features and designated on the basis of geological and hydrological conditions - usually the occurrence of alluvial or unconsolidated deposits. When practical, large basins are also subdivided by political boundaries, as in the Central Valley. Basins are named and numbered per the convention of the Department of Water Resources.</font></p> <font face='Calibri'></font>
num_resources 6
num_tags 25
title CA Bulletin 118 Groundwater Basins