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274 datasets

Surface Water - Fecal Indicator Bacteria Monitoring Results

Published by: California State Water Resources Control Board
Last updated: Wednesday, June 3, 2026
File types: CSV, PDF

Attention: Please note that the Safe to Swim map and its associated resources on California Open Data Portal will not be updated between June 3 to Jun...

TRE ALTAMIRA InSAR Subsidence Data

Published by: California Department of Water Resources
Last updated: Tuesday, June 9, 2026
File types: PDF, HTML, GEOTIFF, ZIP

This dataset represents measurements of vertical ground surface displacement in more than 200 of the high-use and populated groundwater basins across ...

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

Published by: California Department of Water Resources
Last updated: Tuesday, June 9, 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...

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

Published by: California State Water Resources Control Board
Last updated: Wednesday, May 27, 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...

Surface Water - Chemistry Results - CEDEN Augmentation

Published by: California State Water Resources Control Board
Last updated: Wednesday, April 15, 2026
File types: CSV, PDF

This dataset includes field and lab chemistry data that has been submitted to the [California Environmental Data Exchange Network](https://ceden.water...

i03 DAU county cnty2018

Published by: California Department of Water Resources
Last updated: Tuesday, June 9, 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...

Surface Water - Freshwater Harmful Algal Blooms

Published by: California State Water Resources Control Board
Last updated: Wednesday, June 3, 2026
File types: PDF, CSV

Attention: Please note that the Freshwater Harmful Algal Bloom resources on the California Open Data Portal will not be updated from June 3 through Ju...

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 - Benthic Macroinvertebrate Results

Published by: California State Water Resources Control Board
Last updated: Thursday, May 28, 2026
File types: PDF, CSV, ZIP

Data collected for marine benthic infauna, freshwater benthic macroinvertebrate (BMI), algae, bacteria and diatom taxonomic analyses, from the [Califo...

California's National Electric Vehicle Infrastructure Funding Program Map

Published by: California Energy Commission
Last updated: Tuesday, June 9, 2026
File types: HTML, ARCGIS GEOSERVICES REST API

The California Department of Transportation (Caltrans) and the California Energy Commission (CEC) are partnering to implement the federal National Ele...