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782 datasets

Water Quality Data

Published by: California Department of Water Resources
Last updated: Saturday, April 11, 2026
File types: CSV

The California Department of Water Resources (DWR) discrete (vs. continuous) water quality datasets contains DWR-collected, current and historical, ch...

i03 Water Plan Planning Areas

Published by: California Department of Water Resources
Last updated: Saturday, April 11, 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...

Water Loss Audit Data From Urban Retail Water Suppliers (Superseded)

Published by: California Department of Water Resources
Last updated: Saturday, April 11, 2026
File types: XLSX

September 2025 Note: This original 2019 data is superseded by a more recent data which captures newer submissions and resubmissions of older data repo...

DCP Water Quality and Temperature

Published by: California Department of Water Resources
Last updated: Saturday, April 11, 2026
File types: ZIP

The DCP Water Quality and Temperature Study is one of many relicensing documents for the Devil Canyon Project (DCP) Hydropower Project Number 14797. T...

SSWP Water Quality and Temperature

Published by: California Department of Water Resources
Last updated: Saturday, April 11, 2026
File types: ZIP

The SSWP Water Quality and Temperature Study is one of many relicensing documents for the South SWP (SSWP) Hydropower Project Number 2426. The Califor...

i07 Water Shortage Social Vulnerability BlockGroups

Published by: California Department of Water Resources
Last updated: Saturday, April 11, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This dataset represents a water shortage social vulnerability analysis performed by DWR using Census 2021 block groups as the unit of analysis. This f...

Surface Water - Flow Targets for Southern California Streams

Published by: California State Water Resources Control Board
Last updated: Wednesday, October 23, 2019
File types: CSV, PDF, ARCGIS

Changes to instream flow are known to be one of the major factors that affect the health of biological communities. Flow alteration can degrade physic...

Water Quality - Effluent - Electronic Self-Monitoring Report (eSMR) Data

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

Wastewater discharges are regulated by the Water Board. Those regulated are generally required to submit Self-Monitoring Reports to the State or Regio...

Low Water Line

Published by: California State Lands Commission
Last updated: Monday, November 6, 2023
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, GEOJSON, ZIP, KML

This data was created to depict portions of state-owned Sovereign Lands that are under the jurisdiction of the California State Lands Commission. Data...

High Water Line

Published by: California State Lands Commission
Last updated: Friday, April 10, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML, TXT, XLSX, GPKG, GDB

The California State Lands Commission (CSLC) was created by the California Legislature in 1938 and given the authority and responsibility to manage ce...