GWB student or trial version is a good alternative.
http://student.gwb.com/student_download.php
Please follow below link and download the attached paper. I hope this will help you.
Good luck
Article Groundwater Quality Assessment Using Water Quality Index and...http://www.cwejournal.org/vol6no1/hydrochemical-profile-for-assessing-the-groundwater-quality-of-paravanar-river-sub-basin-cuddalore-district-tamil-nadu-india/