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156 datasets

DWR's Basin Characterization Program

Published by: California Department of Water Resources
Last updated: Monday, May 18, 2026
File types: .ZIP, ZIP, FILE GEODATABASE, PDF

DWR has a long history of studying and characterizing California’s groundwater aquifers as a part of [California’s Groundwater (Bulletin 118)](https:/...

CGS Seismic Hazards Program: Liquefaction Zones

Published by: California Department of Conservation
Last updated: Monday, May 18, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML, TXT, XLSX, GPKG, GDB

This is a digital Seismic Hazard Zone Map presenting areas where liquefaction may occur during a strong earthquake. Developers of properties falling w...

CGS Liquefaction Zones

Published by: California Department of Conservation
Last updated: Monday, May 18, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML, TXT, XLSX, GPKG, GDB

This is a digital Seismic Hazard Zone Map presenting areas where liquefaction may occur during a strong earthquake. Developers of properties falling w...

Post Primacy Aquifer Exemptions

Published by: California Department of Conservation
Last updated: Tuesday, May 19, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This post primacy aquifer exemption data depicts areas exempted by the US EPA for Class II injection after the March 14, 1983 Primacy agreement betwee...

Post Primacy Aquifer Exemptions

Published by: California Department of Conservation
Last updated: Tuesday, May 19, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This post primacy aquifer exemption data depicts areas exempted by the US EPA for Class II injection after the March 14, 1983 Primacy agreement betwee...

i08 FaultCrossings SWP ObservationPoints

Published by: California Department of Water Resources
Last updated: Monday, May 18, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Fault Descriptions of locations crossing the California Aqueduct, Coastal Branch, North Bay Aqueduct, and South Bay Aqueduct. Taken from "State Water ...

i08 FaultCrossings StateWaterProject

Published by: California Department of Water Resources
Last updated: Monday, May 18, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Approximate locations of faults crossing the California Aqueduct, Coastal Branch, North Bay Aqueduct, and South Bay Aqueduct. Taken from "State Water ...

Quagga and Zebra Mussel Infested Waters [ds2801]

Published by: California Department of Fish and Wildlife
Last updated: Monday, May 18, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Quagga (Dreissena rostriformis bugensis) and Zebra (Dreissena polymorpha) mussels are highly invasive and easily transported from one waterybody to an...

WDL Ground Surface Displacement - Land Subsidence Monitoring

Published by: California Department of Water Resources
Last updated: Monday, May 18, 2026
File types: CSV

Borehole extensometers are a more site specific method of measuring land subsidence. These instruments consist of a pipe or cable anchored at the bott...

i08 C2VSimFG Boundary

Published by: California Department of Water Resources
Last updated: Monday, May 18, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The boundary dataset covers the model domain of the C2VSimFG. The total area of the model domain is 20,742 square miles. It contains 32,537 elements, ...