Exposure Assessment Models

TMDL Models and Tools

The EPA Center for Exposure Assessment Modeling (CEAM) distributes simulation models and database software designed to quantify movement and concentration of contaminants in lakes, streams, estuaries, and marine environments.

Available Products

The following surface water models were developed by the U.S. Environmental Protection Agency in conjunction with other government, academic, and commercial institutions. To find out more about a particular model, click on a hyper-linked model name in the table below. The models listed are available for download and are subject to the CEAM distribution and support policy.

Product Name Operating System Key Words Maintained By
HSPF Win 9x, NT assessment, biology, compliance, deposition, discharge, environmental effects, estuaries, hydrology, lakes, metals, monitoring, NPS related, NPDES, nutrients, permits, pesticides, point source(s), rivers, sediment, streams, surface water, test/analysis, TMDL related, toxicity CEAM
FTABLE Builder Tool Java enabled browser HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity ERD
GRAY Tool Java enabled browser HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity ERD
GREEN Tool Java enabled browser HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity ERD
Desktop HDFT Win 9x, NT, XP HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity ERD
HDFT Web Version Java enabled browser HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity ERD