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693 datasets

Paleo-Dendrochronological "Tree-Ring" Hydroclimatic Reconstructions for Northern and Southern California River Basins

Published by: California Department of Water Resources
Last updated: Sunday, May 24, 2026
File types: PDF, CSV, ZIP

### Background Tree-ring chronologies allow assessment of hydrologic variability over centuries to millennia, gives historic context for assessing re...

DWR's Basin Characterization Tools - BCTools

Published by: California Department of Water Resources
Last updated: Sunday, May 24, 2026
File types: PNG, ZIP, PDF, .ZIP

[DWR’s California's Groundwater Basin Characterization Program](https://water.ca.gov/Programs/Groundwater-Management/Bulletin-118/Basin-Characterizati...

i16 Census County DisadvantagedCommunities 2023

Published by: California Department of Water Resources
Last updated: Sunday, May 24, 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 Counties feature class. ...

i03 Local Maintenance Areas Flood Protection

Published by: California Department of Water Resources
Last updated: Sunday, May 24, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Boundaries of various types of public agencies with responsibilities that include in part or primarily flood control, system maintenance, and improvem...

i03 DAU county cnty2018

Published by: California Department of Water Resources
Last updated: Sunday, May 24, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Detailed Analysis Unit-(DAU) Convergence via County Boundary cnty18_1 for Cal-Fire, (*See metadata for CAL-FIRE cnty18_1), State of California.The exi...

i16 Census County EconomicallyDistressedAreas 2023

Published by: California Department of Water Resources
Last updated: Sunday, May 24, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This is a copy of the statewide County GIS Tiger file. Created by joining ACS 2019-2023 5 year estimates to the 2020 Census Counties feature class, an...

i08 C2VSimFG Elements

Published by: California Department of Water Resources
Last updated: Sunday, May 24, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

There is a total of 32, 537 elements within the C2VSimFG model, which make-up the finite grid mesh of the model. The elements are subdivided into 21 s...

Drought Monitoring on South-Central California Coastal Watersheds - 2022-2023

Published by: California Department of Fish and Wildlife
Last updated: Sunday, May 24, 2026
File types: XLSX, ZIP

Watersheds included within 2022-2023 South-Central California coast drought monitoring efforts are Chorro, San Luis Obispo, San Simeon, and Santa Rosa...

i07 SignificantResourceAreas Delta 1979

Published by: California Department of Water Resources
Last updated: Sunday, May 24, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

"This section identifies those areas in the Delta which because of their resource value should receive special consideration. Those areas...have ...

North Coast State of the Region, Snapshots and Supplemental Reports All Habitats 2013 to 2017

Published by: California Ocean Protection Council
Last updated: Friday, May 22, 2026
File types: PDF

Learn about the biological, ecological, oceanographic, and socioeconomic conditions around the time of marine protected area (MPA) implementation on t...