Sustainable Groundwater Management Act (SGMA) Basin Prioritization
The following data and resources were used for the SGMA Basin Prioritization of California’s 515 groundwater basins and subbasins. The Department of Water Resources is mandated by California Water Code Section 10933(b) to prioritize each basin based on eight components. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). Additional questions or requests for information related any of the Basin Prioritization datasets should be directed to the Sustainable Groundwater Management Office at sgmps@water.ca.gov. For more information on SGMA Basin Prioritization please visit the [SGMA Basin Prioritization Homepage](https://water.ca.gov/Programs/Groundwater-Management/Basin-Prioritization).
Data files
| Data title and description | Access data | File details | Last updated |
|---|---|---|---|
Component 3 – Public Supply Wells The following data and resources were used for the SGMA Basin Prioritization of California’s 515 groundwater basins and subbasins. The Department of Water Resources is mandated by California Water Code Section 10933(b) to prioritize each basin based on eight components. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). Additional questions or requests for information related any of the Basin Prioritization datasets should be directed to the Sustainable Groundwater Management Office at sgmps@water.ca.gov. For more information on SGMA Basin Prioritization please visit the [SGMA Basin Prioritization Homepage](https://water.ca.gov/Programs/Groundwater-Management/Basin-Prioritization). | Download | CSV | 07/18/25 |
Component 4 - Production Wells The following data and resources were used for the SGMA Basin Prioritization of California’s 515 groundwater basins and subbasins. The Department of Water Resources is mandated by California Water Code Section 10933(b) to prioritize each basin based on eight components. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). Additional questions or requests for information related any of the Basin Prioritization datasets should be directed to the Sustainable Groundwater Management Office at sgmps@water.ca.gov. For more information on SGMA Basin Prioritization please visit the [SGMA Basin Prioritization Homepage](https://water.ca.gov/Programs/Groundwater-Management/Basin-Prioritization). | Download | ZIP | 07/18/25 |
Component 5 – Irrigated Acreage The following data and resources were used for the SGMA Basin Prioritization of California’s 515 groundwater basins and subbasins. The Department of Water Resources is mandated by California Water Code Section 10933(b) to prioritize each basin based on eight components. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). Additional questions or requests for information related any of the Basin Prioritization datasets should be directed to the Sustainable Groundwater Management Office at sgmps@water.ca.gov. For more information on SGMA Basin Prioritization please visit the [SGMA Basin Prioritization Homepage](https://water.ca.gov/Programs/Groundwater-Management/Basin-Prioritization). | Download | ZIP | 07/18/25 |
Component 7b – Subsidence Reference Material The following data and resources were used for the SGMA Basin Prioritization of California’s 515 groundwater basins and subbasins. The Department of Water Resources is mandated by California Water Code Section 10933(b) to prioritize each basin based on eight components. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). Additional questions or requests for information related any of the Basin Prioritization datasets should be directed to the Sustainable Groundwater Management Office at sgmps@water.ca.gov. For more information on SGMA Basin Prioritization please visit the [SGMA Basin Prioritization Homepage](https://water.ca.gov/Programs/Groundwater-Management/Basin-Prioritization). | Download | ZIP | 07/18/25 |
Component 7c – Saline Intrusion Reference Material The following data and resources were used for the SGMA Basin Prioritization of California’s 515 groundwater basins and subbasins. The Department of Water Resources is mandated by California Water Code Section 10933(b) to prioritize each basin based on eight components. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). Additional questions or requests for information related any of the Basin Prioritization datasets should be directed to the Sustainable Groundwater Management Office at sgmps@water.ca.gov. For more information on SGMA Basin Prioritization please visit the [SGMA Basin Prioritization Homepage](https://water.ca.gov/Programs/Groundwater-Management/Basin-Prioritization). | Download | ZIP | 07/18/25 |
Component 8a – Impacts to Habitat and Streamflow Reference Material The following data and resources were used for the SGMA Basin Prioritization of California’s 515 groundwater basins and subbasins. The Department of Water Resources is mandated by California Water Code Section 10933(b) to prioritize each basin based on eight components. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). Additional questions or requests for information related any of the Basin Prioritization datasets should be directed to the Sustainable Groundwater Management Office at sgmps@water.ca.gov. For more information on SGMA Basin Prioritization please visit the [SGMA Basin Prioritization Homepage](https://water.ca.gov/Programs/Groundwater-Management/Basin-Prioritization). | Download | ZIP | 07/18/25 |
Component 8b – Other Local Information Reference Material The following data and resources were used for the SGMA Basin Prioritization of California’s 515 groundwater basins and subbasins. The Department of Water Resources is mandated by California Water Code Section 10933(b) to prioritize each basin based on eight components. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). Additional questions or requests for information related any of the Basin Prioritization datasets should be directed to the Sustainable Groundwater Management Office at sgmps@water.ca.gov. For more information on SGMA Basin Prioritization please visit the [SGMA Basin Prioritization Homepage](https://water.ca.gov/Programs/Groundwater-Management/Basin-Prioritization). | Download | ZIP | 07/18/25 |
SGMA Basin Prioritization (Dashboard Data) The following data and resources were used for the SGMA Basin Prioritization of California’s 515 groundwater basins and subbasins. The Department of Water Resources is mandated by California Water Code Section 10933(b) to prioritize each basin based on eight components. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). Additional questions or requests for information related any of the Basin Prioritization datasets should be directed to the Sustainable Groundwater Management Office at sgmps@water.ca.gov. For more information on SGMA Basin Prioritization please visit the [SGMA Basin Prioritization Homepage](https://water.ca.gov/Programs/Groundwater-Management/Basin-Prioritization). | Download | CSV | 07/18/25 |
Supporting files
| Data title and description | Access data | File details | Last updated |
|---|---|---|---|
SGMA Basin Prioritization Statewide Summary Table SGMA Basin Prioritization Summary Table for all 515 Groundwater Basins | XLSX | 07/18/25 | |
SGMA Basin Prioritization Dashboard - Web Map Web map displaying SGMA Basin Prioritization and data for California's 515 Groundwater Basins defined in Bulletin 118. Note that the original application, created in 2019 can be found here: https://gis.water.ca.gov/app/bp-dashboard. Due to the nature of ESRI updates and DWR data management, the 2019 application loading became unreliable, and was thus recreated in 2026. All data and information are the same. | 07/02/26 | ||
Statewide Map of SGMA 2019 Basin Prioritization Results Statewide Map of SGMA 2019 Basin Prioritization Results | PDF | 07/18/25 | |
Frequently Asked Questions (FAQs) - SGMA Basin Prioritization Frequently Asked Questions (FAQs) about the SGMA Basin Prioritization of California's 515 groundwater basins. | PDF | 07/18/25 | |
Basin Prioritization - Process and Results Document Sustainable Groundwater Management Act Basin Prioritization - Process and Results Document | PDF | 07/18/25 | |
GIS DATA - SGMA 2019 Basin Prioritization Feature Service Link to the SGMA 2019 Basin Prioritization Feature Service. Please note that the above URL, when clicked, will look like an error page. However, the service URL will still function. For metadata, please click here: https://www.arcgis.com/home/item.html?id=3201d08b19bc454596c46c0ac1cc7564#overview. | 07/09/26 | ||
GIS DATA - SGMA 2019 Basin Prioritization Map Service Link to the SGMA 2019 Basin Prioritization Map Service. Please note that the above URL, when clicked, will look like an error page. However, the service URL will still function. For metadata, please click here: https://www.arcgis.com/home/item.html?id=3201d08b19bc454596c46c0ac1cc7564#overview. | 07/09/26 | ||
Components 1 (Population) & 2 (Population Growth) Reference information for Components 1 (Population) and 2 (Population Growth) of Basin Prioritization. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act 2019 Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). | PDF | 07/18/25 | |
Component 6 – Groundwater Reliance For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act 2019 Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). | PDF | 07/18/25 | |
Component 7a – Overdraft (Declining Groundwater Levels) Reference Material Reference data and information for Component 7a (Documented Impacts: Overdraft) of Basin Prioritization. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act 2019 Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). | 07/18/25 | ||
Component 7d - Degraded Water Quality MCL Exceedances Reference data and information for Component 7d (Documented Impacts: Degraded Water Quality) of Basin Prioritization. For more information about how the data was analyzed for Basin Prioritization please see [Sustainable Groundwater Management Act 2019 Basin Prioritization - Process and Results Document](https://data.cnra.ca.gov/dataset/13ebd2d3-4e62-4fee-9342-d7c3ef3e0079/resource/ffafd27b-5e7e-4db3-b846-e7b3cb5c614c/download/sgma_bp_process_document.pdf). | XLSX | 07/18/25 |
