eng Science and Education Publishing Applied Ecology and Environmental Sciences 2328-3920 2021-07-08 9 7 633 639 10.12691/aees-9-7-2 AEES2021972 article Ruchie Gupta 1 C Chandan 2 3 Gursimran Singh 3 Mohinder Pal 3 Deep Shikha deep_shikha79@yahoo.co.in 3 Department of Physics, RIMT University, Mandi Gobindgarh-147 301, India Department of Physics, Sri Guru Teg Bahadur Khalsa College, Sri Anandpur Sahib-140 118, India Estimation of indoor radon levels in the indoor air of a dwelling is an important aspect for the good health of human population spending a substantial portion of their lifetime indoor. Indoor radon combining with thoron and their progenies can accumulate in the houses to a value not suitable for the health of the people living there. The present paper is an attempt in this direction, to find the levels of the above-mentioned radioactive gases with their progenies in the dwellings of the Gurugram district of Haryana. The study was conducted in the summer season in 50 dwellings of the Gurugram district. International Commission on Radiological Protection (ICRP) guidelines were followed to evaluate the results obtained in the study and the district was found to be in the less hazardous zone due to presence of natural radioactive gases in indoor environment of dwellings. http://pubs.sciepub.com/aees/9/7/2/aees-9-7-2.pdf PRTM DTPS/DRPS indoor radon thoron inhalation dose