A high quality secondary sewage effluent was applied to three soil types and its effects on the shear strength, consolidation properties, and permeability of the soils was studied. The three soil types were a poorly graded sand, a clayey silt, and a highly plastic clay. Each soil was divided into nine samples. Six samples were leached with secondary sewage effluent and three with distilled water. After a suitable amount of leachate has passed through the samples, direct shear tests, standard consolidation tests, and falling head permeability tests were performed. The shear strengths of the sand and silt were not appreciably affected by the application of wastewater. The shear strength of the clay was slightly increased by the wastewater effluent. The compressibility, rate of consolidation, and permeability of the silt increased with application of the effluent whereas the clay samples were not affected by the application.