Abstract: Contaminants can be removed from liquids in accordance with systems and methods herein. One exemplary method can involve introducing an input liquid into a pressurized chamber. The method can also involve oxidizing an organic or inorganic contaminant in the input liquid by heating the input liquid in the pressurized chamber, to create an output liquid that has less of the organic or inorganic contaminant than is present in the input liquid. And the method can involve outputting the output liquid from the pressurized chamber.