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44 datasets

Drinking Water - Open Environmental Data Project - March 23, 2023 Workshop

Published by: California State Water Resources Control Board
Last updated: Monday, November 10, 2025
File types: PDF, HTML, CSV, SHP, ZIP, PPTX

The following datasets related to regulated drinking water system facilities in California have been developed and are available for the purpose of th...

Surface Water - Freshwater Harmful Algal Blooms

Published by: California State Water Resources Control Board
Last updated: Thursday, April 2, 2026
File types: PDF, CSV

Freshwater harmful algal bloom (HAB) data from the Freshwater Harmful Algal Bloom (FHAB) data system. The FHAB data system is the California State Wat...

Urban Water Use Objectives – Relevant Data

Published by: California State Water Resources Control Board
Last updated: Monday, March 23, 2026
File types: CSV

The Making Conservation a California Way of Life regulation requires urban retail water suppliers (URWS) to annually calculate their Urban Water Use O...

i03 Local Maintenance Areas Flood Protection

Published by: California Department of Water Resources
Last updated: Thursday, April 2, 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...

i17 Delta Levees Stationing

Published by: California Department of Water Resources
Last updated: Wednesday, April 1, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Levee stations, usually in feet but in some cases miles, snapped to 2017 Delta levee centerlines (derived from the 2017 Delta LiDAR). Base source for ...

i15 Parcels CVFPB

Published by: California Department of Water Resources
Last updated: Thursday, April 2, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This dataset is a compilation of ownership rights represented as parcels owned by the Sacramento & San Joaquin Drainage District of the State of C...

i12 Levee Breaks Historic

Published by: California Department of Water Resources
Last updated: Thursday, April 2, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Dataset was built over years based on a variety of sources and ongoing incidents during the period in which the dataset steward was in the Delta Levee...

i16 Census County DisadvantagedCommunities 2023

Published by: California Department of Water Resources
Last updated: Thursday, April 2, 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. ...

i16 Census BlockGroup DisadvantagedCommunities 2023

Published by: California Department of Water Resources
Last updated: Thursday, April 2, 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 Census 2020 Block Group feature clas...

i16 Census County EconomicallyDistressedAreas 2023

Published by: California Department of Water Resources
Last updated: Thursday, April 2, 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...