In this paper we show the results obtained in the chemical stabilization process of pond sludge by adding common hydrated lime. Dosages of 5%, 7%, 9%, 10%, 11%, 12% and 15% were added in controlled laboratory conditions to a sample of sludge taken from the bottom of the primary facultative pond of the wastewater treatment system of Monteria in Colombia. Dangerousness (corrosivity, flammability and reactivity) and concentrations of sulfides, heavy metals (As, Ba, Cd, Cr, Hg, Ag, Pb, Se), coliforms, salmonella, ascaris and other helminths were analyzed in the sludge sample, before and after the application of an optimal 10% dosage. The reactivity by sulfides and cyanides in the sludge sample was controlled with this dosage, however, coliforms and mesophilic bacteria concentrations did not 1 Ingeniero sanitario. MsC.en Ciencias Ambientales. Docente Facultad de Ingenieria Sanitaria y Ambiental. Coordinador del Grupo de Investigaciones de Calidad de Aguas y Modelacion Hidrica y ambiental-CAMHA. Universidad Pontificia Bolivariana, seccional Monteria, Monteria (Colombia). 2 Ingeniera civil. MsC. en Ingenieria Civil con enfasis en Ambiental. Docente Facultad de Ingenieria Civil. Universidad Pontificia Bolivariana, Seccional Monteria, Monteria (Colombia). Revista EIA, ISSN 1794-1237 / Ano XI / Volumen 11 / Edicion N. 21 / Enero-junio 2014 / pp. 113-122 Publicacion semestral de caracter tecnico-cientifico / Escuela de Ingenieria de Antioquia —EIA—, Envigado (Colombia) DOI: http://dx.doi.org/10.14508/reia.2014.11.21.113-122 Historia del articulo: Articulo recibido: 20-V-2013 / Aprobado: 28-II-2014 Disponible online: 12 de mayo 2014 Discusion abierta hasta mayo de 2015 Autor de correspondencia Feria-Diaz, J. J. (Jhon Jairo).: Carrera 6 N. 97 A 99, Universidad Pontificia Bolivariana, sede Monteria, Monteria (Colombia). Tel: (574) 7860146 Ext.152 Correo electronico: jhon.feria@gmail.com