The United States Environmental Protection Agency (EPA) estimates that one in 15 homes in the U.S. has radon levels above the recommended guideline of 4 picocuries per liter (pCi/L) (148 Bq/m3).[34]
Qiyaastii mid ka mid ah 15 guri ee Mareykanka ku yaal ayaa leh heerar radon ah oo ka sarreeya tilmaamaha lagu taliyey ee ah 4 goobood oo halkii litir ah (pCi / l) (148 Bq / m3).