Exposure Assessment Models

Surface Water Models

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
AQUATOX Win XP, Vista, 2007 aquatox, simulation model, fate prediction, aquatic systems, effect on ecosystem, ecological risk assessments, aquatic ecosystem CEAM
EFDC Win 98, NT, 2000, XP surface water, hydrodynamic, sediment-contaminant, eutrophication, rivers, lakes, reservoirs, wetlands, estuaries, coastal ocean regions, assessment, management, regulatory CEAM
EXAMS Win 98, NT, 2000, XP aquatic biology, assessment, biology, chemistry, compliance, environmental effects, metals, NPS related, permits, pesticides, point source(s), rivers, streams, surface water, test/analysis CEAM
EXPRESS Win 98, NT, 2000, XP przm, exams, exposure, shell CEAM
GCSOLAR Win 9x, NT solar, photolysis, half-life, pollutant, aquatic, ozone CEAM
HSCTM2D Win 9x, NT hydrology, sediment, contaminant, transport, finite element model, river, estuary CEAM
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
HSPF Toolkit Java enabled browser HSPF, WinHSPF, FTABLE, RCHRES, BMP, assessment, compliance, discharge, environmental effects, hydrology, permits, rivers, sediment, streams, surface water, TMDL related, toxicity ERD
PRZM3 Win 98, NT, 2000, XP assessment, discharge, environmental effects, hydrology, land use management, metals, pesticides, surface water, test/analysis CEAM
QUAL2K Win ME, 2000, XP aquatic biology, assessment, compliance, discharge, environmental effects, hydrology, NPS related, NPDES, point source(s), surface water, test/analysis, TMDL related Watershed & Water Quality Modeling Tech Support Center (ERD/EPA Region 4)
RUSLE2 Win 98, NT, 2000, XP rill, interrill, erosion, sediment, overland flow, climate, soil, topography, land use USDA Agricultural Research Service
SERAFM MS-Excel 2003 serafm, exposure, assessment, mecury, hg, surface water, pond, stream, river CEAM
SWMM Win 98, NT, ME, 2000, XP aquatic biology, assessment, combined sewer, community, discharge, environmental effects, metals, NPS related, NPDES, point source(s), procedure, rivers, stormwater, streams, surface water, test/analysis, TMDL related Water Supply & Water Resources Division (NRMRL)
Virtual Beach MS Windows surface water, water bodies, beach, pathogen predictor, multiple linear regression, MLR, best-fit model CEAM
Visual Plumes Win 98, NT, 2000, XP surface, water, jet, plume, model, quality, contaminant, TMDL CEAM
WASP Win 95, 98, ME, 2000, XP aquatic biology, assessment, compliance, discharge, environmental effects, hydrology, metals, NPS related, NPDES, point source(s), surface water, test/analysis, TMDL related Watershed & Water Quality Modeling Tech Support Center (ERD/EPA Region 4)
WHATIF Win XP(SP2) watershed, health, fish, habitat, macro-invertebrate, biodiversity, BASS, biomass, biota, aquatic ecosystem, MAHA, CVI, hydraulic, bankfull, flow, restoration, foodweb, mercury, PCB, dioxin CEAM
WMOST Windows Excel 2010 Integrated Watershed Management, Optimization, Decision-Support, Green Infrastructure, Tool CEAM