California Statewide Groundwater Elevation Monitoring (CASGEM)

Since 2009, the California Statewide Groundwater Elevation Monitoring (CASGEM) Program has tracked seasonal and long-term groundwater elevation trends in groundwater basins and non-basin areas 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. This statewide groundwater elevation monitoring continues to act as a tool to help achieve the goals set out under the Sustainable Groundwater Management Act (SGMA).

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 and the CASGEM Online System. 

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.

 

The CASGEM Online System 
The CASGEM Online System allows the public access to groundwater elevation data submitted through CASGEM and allows registered users to log in to submit groundwater information to the CASGEM program.

Attention CASGEM Online System Users! This summer the Department will be integrating the CASGEM Program’s Online System with the SGMA Portal. This integration will streamline groundwater elevation data management and reporting processes by consolidating into one location – the SGMA Portal. Our goal is to provide a more unified and efficient user experience for local agencies, stakeholders, and the public. No action is required at this time, but stay tuned for further updates. Click here to view the announcement.