Welcome to the CASGEM Online System

Since 2009, DWR's CASGEM Program has tracked seasonal and long-term groundwater elevation trends statewide. Recently, DWR has been working on important updates to the CASGEM Online System.

Learn More about CASGEM

Join the Program

Become a data collector to submit data to the CASGEM Online System by reaching out to casgem@water.ca.gov

Contact DWR

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Stay up-to-date on the latest CASGEM Program information

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Data View Groundwater Well Data

View information for wells and their related elevation readings

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Data View Basin Notification Information

View basin monitoring information for organizations participating in CASGEM

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541,589

elevation readings since CASGEM began in October 2010

307

data collection agencies contributed elevation readings to the DWR

149

agencies designated by the DWR to assist with groundwater basin montoring in California

+1.8 million

water level measurements recorded since December 27, 1849