Mahoney Geochemical Consulting LLC (MGC) specializes in applying the principles of aqueous environmental geochemistry and geochemical modeling to industrial and mining projects.  As “a consultant to the consultant” MGC provides expertise in assessing the behavior of inorganic and organic chemicals in soils and in surface waters and ground waters.  

For IE users - If the News section below cannot be seen the same details are in the Courses/Training Section.   

News and Events


This course has been completed, I expect to put on a course in April 2020.  

Once again I will be putting on my five-day course on Geochemical Modeling during the week of May 13th to the 17th, 2019.  The course will be held in Lakewood, Colorado.  This five day course will cover PHREEQC, PHAST, HYDRA/MEDUSA and possibly PhreePlot.   The course is a combination of lectures  and hands on exercises.   Contact John Mahoney at jmahoney@mahoneygeochem.com for more information.  

We had 16 attendees in the 2019 course.  

We continue to update and expand the presentations in these courses.  The new courses will include some additional discussion about the program PhreePlot and its ability to fit model parameters to observational data.  

PhreePlot Generated Eh-pH Diagram for Uranium