Hello everyone…Actually, I am working on water quality and pollution assessment of some Algerian dams. I have some analyzed parameters namely: pH, Dry residue, Dissolved O2 (%), NO2, NO3, NH4, PO4, BOD5, COD and Organic matter. So, could you please help me to give methodology (main relationships between parameters to conclude the origins and causes of their presence in the water) and software for this study?