Fish and other species were perished for soiling and economy clearing in Tisza river at latest decades

Water pollution and remediation options for multi-source contaminations in freshwaters are happening sometimes, particularly in River Tisza after the cyanide and heavy metals spills of Romanian origin in 2000. The eco-toxicological effects, degradation and bioaccumulation rates of heavy metals have been followed in the next two years. Here the aim was to follow the bioremediation program and present the renewed economy of River Tisza. High concentration of arsenic, lead, mercury and cadmium was measured in the periphython and sediments samples both of the Rivers Tisza and Szamos. International rehabilitation program was planned and accomplished. Here we demonstrate the renewed economy of Tisza with living flora and fauna after 20 years, and the birth of day of May-fly again.