NetpathXL 1.4.7869 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The program lies within Education Tools, more precisely Science Tools.
You can install this free PC software on Windows XP/Vista/7/8/10/11 32-bit. This free tool was originally produced by USGS. The common filename for the program's installer is netpathxl.exe.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The most popular versions among the program users are 1.4, 1.3 and 1.1.
From the developer:
NETPATH is an interactive Fortran 77 computer program used to interpret net geochemical mass-balance reactions between an initial and final water along a hydrologic flow path. Alternatively, NETPATH computes the mixing proportions of two to five initial waters and net geochemical reactions that can account for the observed composition of a final water.
You may want to check out more software, such as SatCalc, MathMatic or MathTrax, which might be related to NetpathXL.