The aim of this study was to look at the aggregation and concentration of heavy metals in various organs of freshwater fish that have come into contact with heavy metal-contaminated water. Cadmium (Cd), zinc (Zn), chromium (Cr), and lead (Pb) were all provided to the fish at sub-lethal concentrations. Heavy metals can penetrate a fish's body from three different routes: the gills, the body surface, and the digestive tract. Strong metal concentration was measured in the liver and gills in the following order: Pb > Cd > Ni > Cr and Cd > Pb > Ni > Cr. In the case of kidneys and flesh tissues, the order was Pb > Cd > Cr > Ni and Pb > Cr > Cd > Ni, respectively. The amounts of cadmium and lead in tissues of Cyprinus carpio (Common carp) were intentionally increased in comparison to the other heavy metals.