在纽约州对2000多个家庭住房进行了一年的~(222)Rn浓度(全州性)测量。被检查的家庭是通过随机拨号电话交谈的方式从全州人口中抽样而选择的。在完成电话调查表和得到被查家庭同意后,再为合格的房主邮去径迹探测器和说明书,要求在主要居住区放置1个探测 A total of ~ 222 Rn concentration (statewide) measurements were performed on more than 2,000 homes in New York State for one year. The families inspected were selected from a sample of statewide populations by random dial telephone conversations. After completing the telephone survey and getting the consent of the investigated family, the tracker and the manual are sent out for the qualified homeowner, requesting that one probe be placed in the main residential area.