Keep PhreeqcUsers Forum going

PHREEQC Users aims to provide a much needed discussion space for geochemists of all experience levels to share ideas and experiences of using the PHREEQC code.

Why is needed?

There are many geochemists around the world using PHREEQC for practical purposes such as assessing treatment of acid rock drainage or irrigation water studies. is a dedicated place where they can share their experience and knowledge, collaborate, discuss input scripts or modelling strategies. Before the inception of this forum, there were limited options for online discussion and fostering of user interaction.

Our progress to date

Since the launch of in March 2014, nearly 800 members have joined the discussion forum and between them, created over 2000 posts in over 700 topics. Some dicussions have well over 4000 views.

Why we need your help

PhreeqcUsers has successfully brought together hundreds of geochemists and helped to answer your questions, but we need your help to keep the forum going. PhreeqcUsers is a self-funded non-profit initiative, we are raising funds to cover the costs of website and domain hosting, as well as the time involved in maintaining and moderating the website. Please consider donating, we can only continue with your help.

Please note that we did not develop the Phreeqc code. The code was developed by the USGS.
  • Zhaoyang Luo 
    • £10 
    • 8 d
  • Kirsty Harrington 
    • £5 
    • 19 d
  • Andrew Freiburger 
    • £15 
    • 26 d
  • Anonymous 
    • £5 
    • 2 mos
  • Evans Manu 
    • £5 
    • 2 mos
See all


Phreeqc Users 
Bristol, ENG
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