USGS: Science for a changing world

PHREEQC (Version 3)--A Computer Program for Speciation, Batch-Reaction, One-Dimensional Transport, and Inverse Geochemical Calculations


Bullet PHREEQC Abstract
Bullet PhreeqcRM
Bullet IPhreeqc Modules (COM/DLL/Library) Abstract
Bullet PhreeqcI Fact Sheet FS-031-02 (PDF)
new bullet Online Version 3 User's Guide
Bullet User Rights Notice
Bullet Notes for training course: Geochemistry for Groundwater Systems 2011 (Geochem2011.tgz, PowerPoint and examples, 180M)

Current Versions:

Bullet Release notes
Bullet PhreeqcI Readme
Bullet PHREEQC Readme--Windows and Linux Batch Versions
Bullet PHREEQC Readme--MacOS(Intel) Batch Version For 10.7-10.11
Bullet IPhreeqc Readme
Bullet PhreeqcRM Readme

Other Resources:

Bullet Discussion forum: Search for answers, ask a question
Bullet FAQ--Frequently Asked Questions about PHREEQC and PhreeqcI
Bullet Mail Archive--Questions and answers about PHREEQC, PhreeqcI, and Netpath
Bullet Appelo's home page: Information, examples, and training courses
Bullet Mike Mueller's PHREEQPY home page: Using PHREEQC in Python


Bullet Version 3.0--Documentation of all features, including high pressure calculations, charting (Windows), Pitzer and SIT activity-coefficient models, CD-MUSIC surface complexation, and isotope capabilities. Updated PhreeqcI. Additional methods for IPhreeqc modules.

Bullet PhreeqcRM--Reaction module for reactive-transport simulators. Based on IPhreeqc, allows access to all PHREEQC reaction capabilities. Contains methods for initial and boundary conditions, running reactions on all model cells, transfer of data to and from the module, and parallization by MPI or OpenMP.


The Free Software Foundation's gunzip is necessary to uncompress the UNIX tar files available below. However, some World Wide Web browsers automatically uncompress retrieved files. Thus, running gunzip as stated in the installation instructions may be unnecessary.

Graphical User Interfaces
Platform Processor File names Size Notes
Windows 32-bit phreeqci-3.3.10-12220.msi 13M Executable, database files, examples, PDF documentation
Notepad++ interface -- Appelo's Notepad++ interface to PHREEQC version 3
PHREEQC for Windows -- PHREEQC for Windows Home Page
Batch Versions of PHREEQC
Platform Processor File names Size Notes
Windows 64-bit phreeqc-3.3.10-12220-x64.msi 3.3M Executable, database files, examples, PDF documentation
MacOS(Intel,OS 10.7+) 64-bit phreeqc-3.3.7-11094.dmg 14M Executable (Intel), database files, examples, and PDF documentation
Windows Any 12M Source, CMake, database files, examples, PDF documentation
Linux Any phreeqc-3.3.10-12220.tar.gz 12M Source, configure, database files, examples, PDF documentation
PhreeqcRM Reaction Module for Transport Models
Platform Processor File names Size Notes
Windows Any 2.0M Source, CMake, database files, examples, HTML documentation
Any Any phreeqcrm-3.3.10-12220.tar.gz 1.9M Source, configure, database files, examples, HTML documentation
IPhreeqc Modules
Platform Processor File names Size Notes
Windows Any 7.4M Source with CMake, database files, examples, and documentation
Linux Any iphreeqc-3.3.10-12220.tar.gz 7.3M Source with configure, database files, examples, and documentation
Windows COM 32-bit IPhreeqcCOM-3.3.10-12220-win32.msi 3.3M COM Server, CHM documentation
64-bit* IPhreeqcCOM-3.3.10-12220-x64.msi 3.4M COM Server, CHM documentation
* -- Both 32-bit and 64-bit COM versions should be installed on 64-bit versions of Windows


Bullet PHREEQC version 3 Documentation (PDF, 4.2M)
Bullet PHREEQC version 2 Documentation (PDF, 2.3M)
Bullet PhreeqcRM Documentation
Bullet PhreeqcI Fact Sheet (PDF, 0.1M)
Bullet IPhreeqc Modules Documentation (PDF, 0.3M)
Bullet IPhreeqc Documentation (CHM, 0.2M) (HTML)
Bullet IPhreeqcCOM Documentation (CHM, 0.2M)


Bullet Status of PHREEQC Programs
Bullet Add Me to the PHREEQC Mailing List (Include the word "subscribe" in body of letter)
Bullet Your Comments/Bug Reports

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Last modified: $Date: 2017-01-12 18:34:38 -0700 (Thu, 12 Jan 2017) $
Visitor number 485701 since Jan 22, 1998.