To your knowledge, have the radon levels
in your home ever been found at
4.0 picocuries per liter (pCi/L) or higher?

Response Unweighted Frequency Weighted Percentage Standard Error 95% Confidence Limit
Lower Upper
Yes 165 7.4 0.6 6.1 8.7
No 2014 92.6 0.6 91.3 93.9

Among respondents who have had the air in their home tested
for radon gas, excluding unknowns and refusals.
 
On Questionnaire Split B