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48 datasets

California's Groundwater Update 2025 (Bulletin 118)

Published by: California Department of Water Resources
Last updated: Thursday, April 2, 2026
File types: PDF, XLS, URL, .ZIP

California's Groundwater: Bulletin 118 Updates (CalGW Updates) are a continuing series of California's primary technical publications on groundwater r...

i02 Natural Communities Commonly Associated with Groundwater (NCCAG)

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

The Natural Communities Commonly Associated with Groundwater (NCCAG) dataset is a compilation of phreatophytic vegetation, regularly flooded natural w...

US EPA Regional Screening Levels (RSLs) (November 2018)

Published by: California Environmental Protection Agency
Last updated: Tuesday, October 29, 2019
File types: XLSX

US EPA Regional Screening Levels (RSLs) (November 2018) ...

2070 Extreme Climate Change Scenarios for Water Supply Planning

Published by: California Department of Water Resources
Last updated: Thursday, April 2, 2026
File types: PDF, ZIP

DWR’s 2070 extreme climate change scenarios enable exploration of the vulnerability of and opportunities for water supply at the potential bounds of f...

i03 Adjudicated Areas

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

Adjudication is a form of groundwater management in California through the courts. When groundwater resources do not meet water demands in an area, la...

i02 NCCAG Vegetation

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 Natural Communities Commonly Associated with Groundwater (NCCAG) dataset is a compilation of phreatophytic vegetation, regularly flooded natural w...

i02 NCCAG Wetlands

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 Natural Communities Commonly Associated with Groundwater (NCCAG) dataset is a compilation of phreatophytic vegetation, regularly flooded natural w...

CalEnviroScreen 2.0

Published by: California Office of Environmental Health Hazard Assessment
Last updated: Wednesday, October 23, 2019
File types: CSV, XLSX, PDF

The Office of Environmental Health Hazard Assessment (OEHHA), on behalf of the California Environmental Protection Agency (CalEPA), developed Californ...

2019 California Water Quality Status Report

Published by: California State Water Resources Control Board
Last updated: Wednesday, October 23, 2019
File types: ZIP, XLSX, CSV, TXT

The California Water Quality Status Report is an annual data-driven snapshot of the Water Board’s water quality and ecosystem data. This third edition...

Bulletin 118 Update 2003 - Basin Reports (formerly known as Basin Descriptions)

Published by: California Department of Water Resources
Last updated: Thursday, April 2, 2026
File types: PDF

This dataset includes the basin reports for the 515 groundwater basins developed as part of Bulletin 118 Update 2003. The reports include descriptions...