Abstract <p>The article analyzes the main achievements in the field of neutralizing effluent water and dangerous halogen containing waste by oxidizing them in water in supercritical state (at temperature <i>t</i> &gt; 374°С and pressure <i>p</i> &gt; 22.1 MPa). Criteria determining the oxidation efficiency are revealed. Problems connected with practical implementation of the discussed approach are formulated, first of all, corrosion of structural materials and deposition of salts. Technical solutions that help improve waste neutralization efficiency, reduce corrosion, and prevent pipelines becoming blocked with solid particles and mineral components are described. The environmental and economic aspects of industrial application of supercritical water oxidation are considered. The conditions for achieving better energy and environmental efficiency of oxidizing waste jointly with conventional fuel kinds are determined. Prospects of applying supercritical water oxidation at thermal power plants for ultrasupercritical steam conditions are noted.</p>