PHREEQC version 3 downloads

  • PHREEQC version 3.8.9 with (adapted) Notepad++ version 6.6.9: phreeqc3.Installer.exe.

    See release notes for what's new and debugged.

    For running in linux or on the Apple, install virtualbox by ORACLE.
    A windows version from XP onwards will work fine, but on XP you may have to install .NET4 from
    dotnetfx40_full_setup.exe

    The manuals, the new Pitzer.dat and the updated help file are installed automatically by the Installer.

  • PHREEQC 3.8 Help, be up-to-date with new options...
    Download the help file as:
    • phreeqc.chm. The plain chm file, save this file. NOTE... Do not open this file, first right-click on the saved file, select Properties, Unblock, Apply, OK. Then, open it, left-clicking on the file.
      (Or, download PHREEQC help as zip and unzip.)

  • PHREEQC Manual for version 3: manual3.pdf.

  • Model equations from the PHREEQC Manual for version 2 (1999): manual2_eqns.pdf.

  • New: Defined the Na2SO4 complex in PHREEQC.DAT for an improved calculation of the solubilities of anhydrite, gypsum, celestite and barite (and other sulfates) in concentrated NaCl solutions. The new numbers are in database_b_2025, and distributed with version 3.8.9: run the files in c:\phreeqc\high_P_T\appendix_AG15.

  • New: The specific conductance is now calculated with an Onsager-Falkenhagen equation, accounting for the viscosity of the solution, and changes of the ion-size a in the Debye-Hückel term κa. The additions extend the applicability to concentrations in the molar range, with AARD for SC and transference numbers smaller than 1% in many cases, see example files in c:\phreeqc\SpecConduct.

  • The viscosity of the solution at P, T is calculated with a modified Jones-Dole equation that sums the contributions of individual solutes: see example files in c:\phreeqc\viscosity.

  • Implicit calculation of diffusion and electro-migration allows for faster calculations, see examples in electro-migration and electro-remediation, principles.

  • From 2015: Pitzer database for Na-K-Mg-Ca-Ba-Cl-CO2-HCO3-SO4-H4SiO4 at high T and P: zipped appendix to the paper, with examples and input files with data. Useful for calculating water-rock interaction at high T, P, and ionic strength.

  • Archive: Source code and databases.

  • David Parkhurst's site has other PHREEQC versions and the phreeqci GUI, and IPhreeqc and phreeqcRM modules for coupling Phreeqc with Python, Excel, and other codes.
           Updates of the USGS version are in https://github.com/usgs-coupled/phreeqc3/releases.

  • Vincent Post's PHREEQC-2 for WINDOWS uses the obsolete version 2.18, but the interface is inviting and the keyword templates may be helpful when starting.

  • David Kinniburgh's PhreePlot allows to make accurate pe-pH diagrams and has a wealth of options for plotting other chemical data, for example:

    pe-pH-As pe-pH-As+sorbed species As sorbed species as function of P_CO2 and PO4

    And, the list species app (lsp) is very useful for analysing and comparing PHREEQC database files. It helps to count and view the species defined within a file at several levels of detail. It also can trim and tidy up existing database files.

    «—