Description
Since 2009, the California Statewide Groundwater Elevation Monitoring (CASGEM) Program has tracked seasonal and long-term groundwater elevation trends in groundwater basins statewide.
The program’s mission is to establish a permanent, locally-managed program of regular and systematic monitoring in all of California's alluvial groundwater basins.
Senate Bill x7-6, passed by the legislature in 2009, established collaboration between local monitoring parties and DWR to collect statewide groundwater elevations, to be made available to the public. In response to the law, we developed the CASGEM program.
Collecting and evaluating these groundwater data on a statewide scale is a fundamental step toward improving management of California's groundwater resources. The CASGEM program relies and builds upon the many previously established local long-term groundwater monitoring and management programs. Our role is to coordinate the CASGEM program, to work cooperatively with local entities, and to maintain the collected elevation data in a readily and widely available public database.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| CASGEM Online System - Data Imports Page Guide | The Data Imports User Guide will teach you how to search for well or elevation imported files and view details for a file selected within the Import Detail pane after signing into the CASGEM Online System. | Open resource | |
| CASGEM Online System - Elevation Readings Import Page Guide | The Elevation Readings Import Page User Guide will teach you how to resolve the data validation errors and submit the import for final saving to the CASGEM database. | Open resource | |
| CASGEM Alternative Monitoring Plan Fact Sheet | This document is a fact sheet regarding CASGEM Alternative Monitoring Plans. | Open resource | |
| CASGEM Online System - Edit Reading Guide | The Edit Reading User Guide will teach you how to edit an existing reading and save it to the CASGEM Online System. | Open resource | |
| Frequently Asked Questions Related to the CASGEM Program | This document provided answers to frequently asked questions (FAQ) regarding the CASGEM Program. | Open resource | |
| CASGEM Online System - Edit History Guide | The Edit History User Guide will teach you how to edit the details of an existing history record and save to the CASGEM Online System. | Open resource | |
| CASGEM Online System - Wells | As many as two million water wells tap California’s groundwater, with approximately 7,000 to 15,000 new wells constructed each year. They range from hand-dug, shallow wells to carefully designed large-production wells drilled to great depths. The Wells User Guide will teach you how to search for wells and view details for the well selected without requiring you to sign into the CASGEM Online System. | Open resource | |
| CASGEM Online System - Add Import Wells Guide | The Add Import Wells User Guide will teach you how to populate the downloaded Excel Import Template and use the Data Import feature to bulk upload the Well data into the CASGEM Online System. | Open resource | |
| CASGEM Groundwater Elevation Monitoring Guidelines | This document contains the Groundwater Elevation Monitoring Guidelines that were developed to assist DWR by establishing criteria for the selection and measurement of monitoring wells in the event that DWR is required to perform the groundwater monitoring functions in lieu of a local monitoring agency pursuant to Water Code Section 10933.5(a). | Open resource | |
| CASGEM Online System - Reference Point and Ground Surface History Guide | The Reference Point/Ground Surface History User Guide will teach you how to view Reference Point/Ground Surface Elevation History details of the well without requiring you to sign into the CASGEM Online System. | Open resource | |
| CASGEM Online System - Add New Well Guide | The Add New Well User Guide will teach you how to add new wells to the CASGEM Online System. The California State Groundwater Elevation Monitoring (CASGEM) Program’s mission is to establish a permanent, locally-managed program of regular and systematic monitoring in all of California's alluvial groundwater basins. The CASGEM Program also encourages the submittal of groundwater monitoring data from areas outside of alluvial groundwater basins to support local management and drought monitoring efforts. | Open resource | |
| CASGEM Online System - Add History Guide | The Add History User Guide will teach you how to add a new history record to the CASGEM Online System. | Open resource | |
| Coming Soon! The CASGEM Online System is Moving to the SGMA Portal | This document contains the announcement information regarding the CASGEM Online System moving to the SGMA Portal in 2025. | Open resource | |
| Coming Soon! The CASGEM Online System is Moving to the SGMA Portal | This document contains the announcement information regarding the CASGEM Online System moving to the SGMA Portal in 2025. | Open resource | |
| CASGEM Monitoring Plan Summary | This CASGEM Monitoring Plan Summary describes the basic components of what should be included in a CASGEM monitoring plan. | Open resource | |
| CASGEM Online System - Add Import - Elevation Readings Guide | The Add Import Elevation Readings User Guide will teach you how to populate the downloaded Excel Import Template and use the Data Import feature to bulk upload groundwater elevation data into the CASGEM Online System. | Open resource | |
| CASGEM Online System - Add New Reading Guide | The Add New Reading User Guide will teach you how to add a new reading to the CASGEM Online System. The California State Groundwater Elevation Monitoring (CASGEM) Program’s mission is to establish a permanent, locally-managed program of regular and systematic monitoring in all of California's alluvial groundwater basins. The CASGEM Program also encourages the submittal of groundwater monitoring data from areas outside of alluvial groundwater basins to support local management and drought monitoring efforts. | Open resource | |
| CASGEM Online System - Well Directory Guide | The Well Directory User Guide will teach you how to associate well(s) that are not assigned to your organization through the CAGSEM Online system. | Open resource | |
| CASGEM Online System - Wells Import Page Guide | The Wells Import Page User Guide will teach you how to identify data validation errors and submit the import for final saving to the CASGEM database. | Open resource | |
| CASGEM Online System - Edit Well Guide | The Edit Well User Guide will teach you how to edit the details of an existing well and save it to the CASGEM Online System. The California State Groundwater Elevation Monitoring (CASGEM) Program’s mission is to establish a permanent, locally-managed program of regular and systematic monitoring in all of California's alluvial groundwater basins. The CASGEM Program also encourages the submittal of groundwater monitoring data from areas outside of alluvial groundwater basins to support local management and drought monitoring efforts. | Open resource | |
| CASGEM Online System - Elevation Readings Guide | The Elevation Readings User Guide will teach you how to view details for the reading selected without requiring you to sign into the CASGEM Online System. The California State Groundwater Elevation Monitoring (CASGEM) Program’s mission is to establish a permanent, locally-managed program of regular and systematic monitoring in all of California's alluvial groundwater basins. The CASGEM Program also encourages the submittal of groundwater monitoring data from areas outside of alluvial groundwater basins to support local management and drought monitoring efforts. | Open resource |