Water Resources Division (WRD)

Explaining the GSI Pathway

 Explaining the GSI Pathway

Because of Michigan’s complex geology, the groundwater-surface water interface (GSI) plays an important role in the state’s environmental cleanup program. Last month, we shared with you information about recent updates made by the MDEQ to the Generic Cleanup Criteria Tables.  But what exactly is a GSI Pathway and how is GSI Pathway relevancy determined?