Wastewater-contaminated soil and groundwater is generally noticed in many residential and industrial districts in
various countries in the world. In Arar’s city, underground permeable septic tanks have been used to collect domestic
wastewater from about 90% of residential buildings. Wastewater, natural soil and polluted soil samples were taken from
five districts. A series of chemical analysis was carried out for the obtained samples. Organic, chemical and elemental
compositions of wastewater and soil samples were identified and analyzed. Results showed that wastewater contains many
injurious organic and chemical compositions. Also, the results indicated the wastewater seepage into ground has negative
effects on the chemical compositions of polluted soil and dangerous effects on groundwater. Alerting the key persons,
engineers and others about the dangerous effects on environmental and general health must be known and announced.