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190 datasets

i07 Habitat Delta 1977

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

1977 Delta Habitat Types were made digital by heads up digitizing registered scanned pages from 1979 Delta Environmental Atlas, produced by USACE. &qu...

i16 Census BlockGroup EconomicallyDistressedAreas 2023

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This is a copy of the statewide Census Block Group GIS Tiger file. The IRWM web based EDA mapping tool uses this GIS layer. Created by joining ACS 201...

i08 GroundwaterLevelChange Contours

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
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...

i16 Census Tract DisadvantagedCommunities 2023

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The IRWM web based DAC mapping tool uses this GIS layer. Created by joining ACS 2019-2023 5 year estimates to the 2020 Census Tracts feature class. Th...

i16 Census Tract EconomicallyDistressedAreas 2023

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

The IRWM web based EDA mapping tool uses this GIS layer. Created by joining ACS 2019-2023 5 year estimates to the 2020 Census Tract feature class. The...

i03 Hydrologic Regions

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Description for i03_DAU_county_cnty2018 is as follows:Detailed Analysis Unit-(DAU) Convergence via County Boundary cnty18_1 for Cal-Fire, (*See metada...

i03 Water Plan Planning Areas

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Description for i03_DAU_county_cnty2018 is as follows:Detailed Analysis Unit-(DAU) Convergence via County Boundary cnty18_1 for Cal-Fire, (*See metada...

DCP ESA Listed Bird Species Riparian Habitat Evaluation

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
File types: ZIP

The DCP ESA Listed Bird Species Riparian Habitat Evaluation Study is one of many relicensing documents for the Devil Canyon Project (DCP) Hydropower P...

California's Groundwater Update 2020 (Bulletin 118)

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
File types: PDF, XLSX, XLS, ZIP, SHP

California's Groundwater Update 2020 (CalGW) is California's foremost technical publication on groundwater in the state of California. CalGW, formally...

National Hydrography Data - NHD and 3DHP

Published by: California Department of Water Resources
Last updated: Thursday, August 13, 2026
File types: HTML, ARCGIS GEOSERVICES REST API

The USGS National Hydrography Dataset (NHD) downloadable data collection from The National Map (TNM) is a comprehensive set of digital spatial data th...