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PESTAN for Windows

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PESTAN is used to estimate the vertical migration of dissolved organic solutes through the vadose zone to groundwater. Estimates are based on a closed-form analytical solution of the advective-dispersive-reactive transport equation. The model is intended for use in conducting initial screening assessments of the potential for contamination of ground-water from currently registered pesticides and those submitted for registration.


Version 4.0
Release Date  
Development Status general release
Development Information  
Operating System Windows
Development Language  
Intended Audience  
Key Words  
Related Web Sites  

Minimum System Requirements

To run PESTAN, you will need the following:


Unzipping SoftwareExit EPA disclaimer

You will need unzipping (compression) software to uncompress ZIP files. If you need to load unzipping software on your computer, free software is available for download on the internet at the following sites:

PESTAN Setup (EXE) (5.34 MB)

"PESTAN, Pesticide analytical Model, Version 4.0."

Installation Instructions

  1. Download the PESTANsetup.exe file onto your harddrive.
  2. Run the PESTANsetup.exe file. You will be guided through the installation process.
  3. The User's Manual (pestan.pdf) comes with the installation and is accessible from within the program.

If your operating system is older than Windows XP, you will need to download and install the following file:

This will install the Microsoft .Net Framework, which is needed to run PESTAN

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.

Office of Research & Development | National Risk Management Research Laboratory

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