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87 datasets

Water Quality Data

Published by: California Department of Water Resources
Last updated: Friday, July 10, 2026
File types: CSV

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

Spatial CIMIS ETo maps — Daily Reference Evapotranspiration for California

Published by: California Department of Water Resources
Last updated: Friday, July 10, 2026
File types: GEOTIFF, TXT

🔔 Full-year 2025 data now available — Complete daily ETo for January–December 2025 has been published, replacing the partial-year v1 file. See the Ch...

CGS Mineral Hazards: Indoor Radon Potential Study Areas

Published by: California Department of Conservation
Last updated: Friday, July 10, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

Study area boundaries for indoor radon potential conducted by the California Geological Survey....

Ocean Acidification, Hypoxia (West Coast) and Biological (California) Monitoring Locations

Published by: California Ocean Protection Council
Last updated: Friday, July 10, 2026
File types: CSV, GEOJSON

Ocean Acidification and Hypoxia (OAH) and ecosystem monitoring project locations compiled by Ocean Protection Council staff....

Post Primacy Aquifer Exemptions

Published by: California Department of Conservation
Last updated: Thursday, July 9, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This post primacy aquifer exemption data depicts areas exempted by the US EPA for Class II injection after the March 14, 1983 Primacy agreement betwee...

Post Primacy Aquifer Exemptions

Published by: California Department of Conservation
Last updated: Friday, July 10, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This post primacy aquifer exemption data depicts areas exempted by the US EPA for Class II injection after the March 14, 1983 Primacy agreement betwee...

CGS Mineral Hazards: Indoor Radon Potential Zones

Published by: California Department of Conservation
Last updated: Friday, July 10, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML

This digital layer contains polygons (vector format) of portions of California designated as having high, moderate, low, or unknown potential for home...

CGS Liquefaction Zones

Published by: California Department of Conservation
Last updated: Friday, July 10, 2026
File types: HTML, ARCGIS GEOSERVICES REST API, CSV, ZIP, GEOJSON, KML, TXT, XLSX, GPKG, GDB

This is a digital Seismic Hazard Zone Map presenting areas where liquefaction may occur during a strong earthquake. Developers of properties falling w...

DSM2 v8.2.2

Published by: California Department of Water Resources
Last updated: Friday, July 10, 2026
File types: ZIP

The current release DSM2 v8.2.2 differs from the previous release DSM2 v8.2.1 in that a bug in ECO-PTM was fixed. Specifically, ECO-PTM in DSM2 v8.2....

2020 DSM2 v 8.2.0 Calibration

Published by: California Department of Water Resources
Last updated: Friday, July 10, 2026
File types: DSS, ARCGIS, CSDP .CDN FILE

Files related to the 2020 calibration of DSM2 v 8.2.0...