I tested my home a found a radon level higher than 4 pCi/l. What should I do?
The EPA recommends that if the initial screening result was from 4.0 pCi/l to 9.9 pCi/l, a second test of long-term duration should be taken and used as the basis for determining mitigation. If the first test was 10.0 pCi/l or above, a second test of short term duration should be taken and the average between the two used as the basis for evaluating the situation. We recommend long-term testing whenever possible, and when the homeowner is comfortable with long-term testing. (For more information, see EPA’s brochure “Consumer”s Guide to Radon Reduction” – also available from the Radon Program, or from the EPA Public Information Center 202/260-2080 (document number 402-k92-003)).
