M. Reimanis, J.Ozolins, J. Maler. Possibilities to decrese the mirobiological pollution of the water by using electrolysis with TiOx ceramic electrodes. In this research paper influence of electrolysis process on decomposition of organic matter and microorganism propagation in water has been studded. Specially synthesized TiOx containing ceramic electrode was used as an anode. The quantity of organic matter in the water was given as permanganate index IMn, mg O2/L. In this study it was found that if the current density is increased to 8,3mA/cm2 for 2 hours the IMn of the treated water decreased by 10%. If chloride ions are present during the electrolysis the decrease of IMn was more rapid using current density 8,3mA/cm2 IMn decreased by 78% in 1 hour. Use of the TiOx electrode promotes the deterioration of organic matter as indicated by changes in IMn. IMn also indirectly indicates the amount of microorganisms in the water. Electrolysis process using a ceramic TiOx electrode in the presence of chloride ions can create a lasting disinfectant effect that manifests as decrease in propagation intensity of microorganisms.