Download EPA's Most Used Air Quality Models

Used in more detailed studies of maximum air quality impacts (Phase 3-Refined Modeling Analysis). The purpose is to compute short term concentration or deposition values, from multiple sources, on specified locations (i.e., receptors).

Click the filename to download the file.

This is the latest version of the regulatory model ISCST3 (02035) which was released by U.S. EPA on February 27, 2002.

ISCST.ZIP 1.65 MB 02/27/02 (Executable, Source, Test Cases)

Click Here For ISCST3 Model Evaluation References

Lakes Interface for ISCST3: ISC-AERMOD View
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ISCLT3 - Industrial Source Complex - Long Term

ISC3 Long Term dispersion model is used to model emissions with long-term averaging periods.

Click the filename to download the file.

ISCLT3-L.ZIP 220,542 bytes 09/18/95 (ISCLT3 *.EXE(Lahey))
ISCLTSRC.ZIP 134,493 bytes 09/18/95 (ISCLT3 Source Code (Lahey and Microsoft))
AREALTL.ZIP 7,787 bytes 09/18/95 (Area Source Test Case (Lahey))
DEPLTL.ZIP 6,647 bytes 09/18/95 (Deposition Test Case (Lahey))
TEST-LTL.ZIP 19,979 bytes 09/18/95 (Original ISCLT Test Case (Lahey))
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ISC3 User's Guide (ISCST3 & ISCLT3)

Click the filename to download the file.

ISC3V1.PDF 1.16Mb (User's Guide - Volume 1 - with Addendum)
ISC3V2.PDF 570 Kb (User's Guide - Volume 2 - with Addendum)

ISC3UG.ZIP 552 Kb 04/27/00 (User's Guides - All Volumes - WP format))
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ISC-PRIME - Industrial Source Complex - Plume RIse Model Enhancements

ISC-PRIME dispersion model is being evaluated as the next generation building downwash model. This version of the ISC model has a new set of algorithms and has been named ISC-PRIME. The files below are made available for review and evaluation.

Click the filename to download the file.

ISCPRIME.TXT 6.07 KB 08/24/98 (ISC-PRIME ReadMe (Read First))
USEGUIDE.PDF 229 KB 08/24/98 (ISC-PRIME User's Guide)

ISCPRMSR.ZIP 213 KB 1/28/99 (ISC-PRIME and BPIPPRM source codes)
PRMTESTS.ZIP 624 KB 1/28/99 (ISC-PRIME and BPIPRM Executables, Met Data and Test Cases)

PRIMPLDN.PDF 589 KB 10/25/99 (Draft: Development and Evaluation of the PRIME Plume Rise and Building Downwash Model)
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AERMOD

AERMOD is the next generation air dispersion modeling system and consists of 3 components - AERMOD (air dispersion model), AERMET (meteorological data preprocessor) and AERMAP (terrain preprocessor). A brief overview of the model can be found in the mod-desc.txt file below.

Update: AERMOD (with PRIME downwash) version 02222 Beta

AERMODB.ZIP 542 KB 8/15/02 (AERMOD Executable)
AERMODUGB.PDF 1.1 MB 8/15/02 (AERMOD User's Guide)
AERMODSRB.ZIP 308 KB 8/15/02 (AERMOD Source Code)
AERMODEXB.ZIP 20 KB 8/15/02 (AERMOD Test Case)

AERMET version 02222 Beta

AERMETREADME.TXT 3 KB 8/15/02 (AERMET readme - read first)
AERMETB.ZIP        461 KB 8/15/02 (AERMET Stage 1, 2 & 3 Executables)
AERMETUGB.ZIP       606 KB 8/15/02 (AERMET User's Guide - with Addendum changes)
AERMETSRB.ZIP        314 KB 8/15/02 (AERMET Source Code)
AERMETEXB.ZIP       2.77 MB 8/15/02 (AERMET Test Case)

AERMAP version 03107 Beta

AERMAPREADMEB2.TXT 5 KB 4/28/03 (Brief description of AERMAP)
AERMAPUGB2.PDF      325 KB 4/28/03 (AERMAP User's Guide)
AERMAPSRB2.ZIP        78 KB 4/28/03 (AERMAP Source Code)
AERMAPEXB2.ZIP          304 KB 4/28/03 (AERMAP Executable)
DEMFILZ.ZIP                   205 KB 4/28/03 (SDTS to DEM conversion)
AERMAPTCB2.ZIP          2.1 MB 4/28/03 (AERMAP Test Case)

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CALINE3 (California Line Source Dispersion Model)

Air quality models used to predict pollutant concentration near roadway intersections. CAL3QHC is an enhanced version of CALINE3, with the additional traffic algorithm to estimate vehicular queue lengths at intersections with traffic stop lights. We recommend that you get both models. The theoretical information regarding the CALINE3 implementation in CAL3QHC is only presented in CALINE3 User's Guide.

Click the filename to download the file.

CALINE3.ZIP 52,564 bytes 06/13/91 (PC version EXE included)
CALINE3D.ZIP 23,009 bytes 08/31/93 (CALINE3 WP Format)
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CALINE4 (California Line Source Dispersion Model)

CALINE4 is a modeling program to assess air quality impacts near transportation facilities. It is based on the Gaussian diffusion equation and employs a mixing zone concept to characterize pollutant dispersion over the roadway. CALINE4 comes with a Windows user interface.

Click the filename to download the file.

ZCALINE4.EXE    2,127KB 04/13/99 (Windows Interface and EXE included)
CL4GUIDE.PDF     390 KB 09/10/98 (User's Guide for CALINE4 Interface)
CALINE41989.PDF 7.7 MB      06/89 (Manual for the CALINE4 Model)
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CAL3QHC

See description for CALINE3

Click the filename to download the file.

CAL3QHC.ZIP 323,189 bytes 10/19/95 (PC version EXE included)
CAL3QHCD.ZIP 130,608 bytes 10/19/95 (User's Guide/WP 5.1-CAL3QHCR Addendum included)
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FDM

FDM (Fugitive Dust Model) is an air quality model designed for computing concentration and deposition impacts from fugitive dust sources.

Click the filename to download the file.

FDM1.ZIP 383,939 bytes 10/08/93 (FDM.EXE, Source Code, and Readme.txt)
FDM2.ZIP 389,660 bytes 10/07/93 (FDM test case and postprocessor)
FDMD.ZIP 116,736 bytes 10/07/93 (FDM User's Guide in WP5.1)
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UAM-IV (Urban Airshed Model)

UAM-IV is an urban scale, three dimensional, grid type numerical simulation model. The model incorporates a condensed photochemical kinetics mechanism for urban atmospheres. UAM-IV is designed for computing ozone (O3) concentrations under short-term, episodic conditions lasting one or two days resulting from emissions of oxides of nitrogen (NOx), volatile organic compounds (VOC), and carbon monoxide (CO). The model treats VOC emissions as their carbon-bond surrogates.

Click the filename to download the file.

UAMREAD.TXT     3 KB (Read This First)
UAM.ZIP          5.33 MB (UAM-IV Modeling System )
UAMUG.ZIP      226 KB (User's Guide for UAM-IV)