Science & Technology
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Clarification Memo on Additional Methods, Determinations, and Analyses to Modify Air Quality Data Beyond Exceptional Events
Additional Methods Determinations
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The Clean Air Act: Solving Air Pollution Problems with Science and Technology
The Act calls for states and EPA to solve multiple air pollution problems through programs based on the latest science and technology information.
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Stakeholder Webinar (Nov. 2022): Natural Gas & Petroleum Systems in the GHG Inventory
2021 GHGI September 2021 Webinar Supporting Materials
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IRIS Program Outlook
This page describes assessments that are in development and projected public milestone dates.
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IRIS Recent Additions
Users can find notifications of detailed changes to IRIS website over the years.
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EnviroAtlas Fact Sheets
Data Fact Sheets are a vital resource for EnviroAtlas users. They provide detail, guidance, and references for the 300+ data layers featured in the Interactive Map.
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Environmental Fluid Dynamics Code (EFDC) Brochure
On Environmental Fluid Dynamics Code (EFDC), a multifunctional surface water modeling system, which includes hydrodynamic, sediment-contaminant, and eutrophication components.
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EFDC Read Me for EPA Version 1.01
The Environmental Fluid Dynamics Code (EFDC) is a multifunctional surface water modeling system, which includes hydrodynamic, sediment-contaminant, and eutrophication components.
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EFDC Manuals
The Environmental Fluid Dynamics Code (EFDC) is a multifunctional surface water modeling system, which includes hydrodynamic, sediment-contaminant, and eutrophication components.
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WASP Fact Sheet
This model helps users interpret
and predict water quality responses to natural
phenomena and man-made pollution for various
pollution management decisions. -
Environmental Fluid Dynamics Code (EFDC) Reference List
References to EFDC in Referred Journals (as of 4/2006) & Referred Book Chapters and Conference Proceedings (as of 2000), provides partial lists of EFDC Technical Reports & Application Reports
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WASP Model Documentation
WASP8 Model documentation for: Water Transport, Sediment Transport, Eutrophication, Macro Algae and Periphyton, Sediment Diagenesis, Water Temperature, pH and Alkalinity, Light
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Environment Fluid Dynamics Code (EFDC) - Download Page
Executable and documentation access, and system requirements information for the Environmental Fluid Dynamics Code (EFDC) multifunctional surface water modeling system software
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WASP7 Course
Water Quality Analysis Modeling System Tutorial version 7.0
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WASP7 Download
Contains the WASP Model including the data preprocessor, the kinetic models, graphical post processor, and model documentation. User is encouraged to download the example input files.
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WASP Model Release Notes
WASP Model Release Notes, enhancements, corrections.
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WASP Model Examples
Download the files used in the Online Tutorial for WASP8.
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Dilution Models for Effluent Discharges - Visual Plumes (4th Edition)
Manual for Visual Plumes, a Windows-based mixing zone modeling application simulating single & merging submerged plumes in arbitrarily stratified ambient flow & buoyant surface discharges.
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WASP Model Tutorials
Contains WASP tutorial videos. WASP Command Line, WASP, Modeling Dissolved Oxygen, Building a Steady State Example, Modeling Nutrients in Rivers, Nutrient Cycles, Interpreting Water Quality Models, Linking with LSPC, WRDB, BASINS, WCS, WASP Network Tool
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GCSOLAR Release Notes
Release notes for the GCSOLAR software model, a set of routines that computes direct photolysis rates and half-lives of pollutants in the aquatic environment.