In this study, the radon concentration of Al-Khamisiyah (A) stores and the adjacent residential areas (Al-Twirat area (B), and the Al-Khamisiyah (C) residential area) located in the southwest of Dhi Qar governorate were measured by five samples for each area for the study models (soil, water, Plants) by using the alpha particle counting technique emitted from radon in the nuclear trace detector (CR-39). The study included three parts, the first part is to measure the radon concentration in samples from the soil and with depths of 60 cm, 15cm, 2cm)) for areas (A, B, C) where the highest concentration was at 2cm depth and the lowest concentration was at the depth 60cm and for all study areas, the highest concentration was in Region A, for all depths, and the lowest concentration in region B. The second part included determining the concentrations of radon gas in the waters of passing rivers in regions (A, B, C), where the highest concentration was in area A and the lowest concentration in region B. As for the third part, it included determining radon concentrations in some types of plants that grow in those regions (A, B, C) such as reeds, sedge and brains, where the highest concentration was in the reed plant and the lowest concentration in the clematis plant and for all areas of study. Finally, we would like to point out that the current study is considered one of the important and vital studies because it is related to the health and safety of humans.