偏高，但還沒過紅線（內詳）

美國權威機構EPA是這樣說的：

The average indoor radon level is estimated to be about 1.3 pCi/L; roughly 0.4 pCi/L of radon is normally found in the outside air.  The U.S. Congress has set a long-term goal that indoor radon levels be no more than outdoor levels.  While this goal is not yet technologically achievable for all homes, radon levels in many homes can be reduced to 2 pCi/L or less. A radon level below 4 pCi/L still poses a risk. Consider fixing when the radon level is between 2 and 4 pCi/L.

一般而言，過了4必須安裝通風設施，這是紅線。在2和4之間最好也建議安裝。
 

所有跟帖： 

• 謝謝分享 -sky-light- ♀ (0 bytes) () 03/05/2017 postreply 08:03:41

• 我家裝了個永久性的測試表，個別時候會到2.4，大部分時間在2以下。 -dudaan- ♂ (44 bytes) () 03/05/2017 postreply 08:10:23

• 能否告訴那種測試表？ 謝謝 -ck1516- ♀ (0 bytes) () 03/06/2017 postreply 04:23:56