GIS in environmental contamination is the use of GIS software in mapping out the contaminants in soil and water using the spatial interpolation tools from GIS.  Spatial interpolation allows for more efficient approach to remediation and monitoring of soil and water contaminants.  Soil and water contamination by metals and other contaminants have become a major environmental problem after the industrialization across many parts of the world.  As a result, environmental agencies are placed in charge in remediating, monitoring, and mitigating the soil contamination sites.  GIS is used to monitor the sites for metal contaminants in the soil, and based on the GIS analysis, highest risk sites are identified in which majority of the remediation and monitoring takes place.