Abstract: Decontamination/bioremediation of soils contaminated by organic and/or inorganic compounds includes the addition of a natural substrate containing nutrients to the contaminated soil, a period of time of anaerobic rest of said soil with control of the oxidation-reduction potential, of the humidity rate, of the field capacity and of the temperature, and thereafter the aeration of same; also decontaminated/bioremediated are surface or underground waters contaminated by organic and/or inorganic compounds, as the method for the bioremediation of contaminated soil is provided as the natural substrate containing nutrients and added to the soil reaches the level of the water and/or aquifer table contaminated by the organic and/or inorganic compounds, thus inducing the bioremediation thereof.