An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Environmental Modeling Community of Practice


Cornell Mixing Zone Expert System (CORMIX) is no longer distributed or supported by the EPA Center for Exposure Assessment Modeling (CEAM). Information on a Windows version of CORMIX is available from the CORMIX Home Page Exit. Contact Dr. Robert Doneker of Oregon Graduate Institute (OGI) Department of Environmental Science and Engineering for technical information and support.