This tool is intended to provide a knowledge of relative groundwater age across California, using the tritium-helium dating technique employed by the GAMA Program work with the LLNL, previously published. It allows the user to analyze relative groundwater age of the tritium-containing groundwater (young portion) to observe vulnerability to groundwater contamination via recharge.
Go to ToolGroundwater Vulnerability Using Relative Groundwater Age
![](https://f0b362.p3cdn2.secureserver.net/wp-content/uploads/2020/02/GW-Vulnerability-GW-Age-1200x552.jpg)