This paper presents the results of experimental studies on the removal of heavy metals from industrial wastewater using electroflotation. Field observations revealed a consistent excess of maximum permissible concentrations of iron, manganese, zinc, and copper in the wastewater of a mechanical engineering plant, exceeding fishery standards. The main sources of pollution were identified: technological processes of abrasive waterjet cutting of metal, destruction of abrasive material (garnet sand), and elevated background concentrations of metals in tap water. A laboratory electroflotation unit was designed, and experimental studies of wastewater treatment were conducted. The optimal process parameters were determined: current density of 420 A/m², voltage >50 V, and processing time of 20 minutes. The electrochemical aspects of the process, including the phenomena of electrode passivation, polarization, and corrosion, were studied. It was established that the bulk of heavy metals is in an undissolved form, which ensures the effectiveness of flotation extraction without preliminary chemical preparation. The achieved degree of purification ensures compliance with water quality standards