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22 datasets

Geologic Map of California (2010)

Published by: California Department of Conservation
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API

This edition of the Geologic Map of California was prepared in recognition of the California Geological Survey's 150th Anniversary. It is an all-digit...

i08 Delta InChannel Islands

Published by: California Department of Water Resources
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Data contains historical polygons of in-channel islands within the Sacramento San Joaquin Delta. Data consists of merged datasets from 1929, 1940, 194...

i08 CriticallyOverdraftedBasins

Published by: California Department of Water Resources
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The dataset is a feature class showing the boundaries of 515 groundwater basins and subbasins as defined by the California Department of Water Resourc...

i08 GroundwaterLevelChangeSeasonal Contours

Published by: California Department of Water Resources
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This dataset depicts contours of estimated change in groundwater piezometric surfaces in the unconfined or uppermost semi-confined aquifers, between t...

i08 B118 CA GroundwaterBasins

Published by: California Department of Water Resources
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The dataset is a feature class showing the boundaries of 515 groundwater basins and subbasins as defined by the California Department of Water Resourc...

i08 B118 CA GroundwaterBasins 2016

Published by: California Department of Water Resources
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The dataset is a feature class showing the boundaries of 517 groundwater basins and subbasins as defined by the California Department of Water Resourc...

i08 Stations Discrete Grab Water Quality

Published by: California Department of Water Resources
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This is a point feature class of environmental monitoring stations maintained in the California Department of Water Resources’ (hereafter the Departme...

i08 Stations Discrete Grab Water Quality

Published by: California Department of Water Resources
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API

This is a point feature class of environmental monitoring stations maintained in the California Department of Water Resources’ (hereafter the Departme...

i08 Stations Discrete Grab Water Quality POR

Published by: California Department of Water Resources
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This is a point feature class of environmental monitoring stations maintained in the California Department of Water Resources’ (hereafter the Departme...

i03 Groundwater Sustainability Agencies

Published by: California Department of Water Resources
Last updated: Monday, October 13, 2025
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The passage of the Sustainable Groundwater Management Act (SGMA) in 2014 set forth a statewide framework to help protect groundwater resources over th...