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 This website is no longer updated and links to external websites and some internal pages may not work.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


This model has been archived and is no longer available on the EPA Center for Exposure Assessment Modeling (CEAM) Web site. CEAM recommends the use of the RUSLE2 Exitmodel which is maintained by the USDA Agricultural Research Service.