Assertion: radon's level | /r/HasProperty | 1.25 picocuries per liter
Facets:
value: in the u.s.
type: LOCATION
Source sentences:
text: In the U.S., the average level of indoor radon is 1.25 picocuries per liter (pCi/L) but here in NH, it is estimated to be 1.8 pCi/L.