Table 2. Risk of cancer from radon exposure for never smokers.

Radon level	If 1,000 people who never smoked were exposed to this level over a lifetimea. . .	The risk of cancer from radon exposure compares tob. . .	What to do:
20 pCi/L	About 36 people could get lung cancer	35 times the risk of drowning	Fix your home
10 pCi/L	About 18 people could get lung cancer	20 times the risk of dying in a home fire	Fix your home
8 pCi/L	About 15 people could get lung cancer	4 times the risk of dying in a fall	Fix your home
4 pCi/L	About 7 people could get lung cancer	< the risk of dying in a car crash	Fix your home
2 pCi/L	About 4 people could get lung cancer	< the risk of dying from poison	Consider fixing your home if levels are 2-3.9 pCi/L
1.3 pCi/L	About 2 people could get lung cancer	(Average indoor radon level)	(Reducing radon levels below 2 pCi/L is difficult)
0.4 pCi/L	-	(Average outdoor radon level)

Adapted from the U.S. Environmental Protection Agency. ^{64 )} Note: If you are a former smoker, your risk may be higher. ^aLifetime risk of lung cancer deaths according to the U.S. Environmental Protection Agency Assessment of Risks from Radon in Homes (EPA 402-R-03-003). ^bComparison data calculated using the 1999-2001 National Center for Injury Prevention and Control Report by the Centers for Disease Control and Prevention.