Seasonal variation of indoor radon-222 levels in dwellings in Ramallah province and East Jerusalem suburbs, Palestine

This study presents the seasonal variations of indoor radon levels in dwellings located in the Ramallah province and East Jerusalem suburbs, Palestine. The measurements were performed during the summer and winter of the year 2006/2007 using CR-39 solid-state-nuclear-track detectors. The total number of investigated buildings is 75 in summer and 81 in winter. A total number of 142 dosemeters are installed in dwellings for each season for a period of almost 100 d. The radon concentration levels in summer varied from 43 to 192 Bq m−3 for buildings in the Ramallah province and from 30 to 655 Bq m−3 for East Jerusalem suburbs. In winter, the radon concentration levels are found to vary from 38 to 375 Bq m−3 in the Ramallah buildings and from 35 to 984 Bq m−3 in East Jerusalem suburbs. The obtained results for radon concentration levels in most places are found to be within the accepted international levels.