how long do radon tests take
Step 1. Take a short-term radon test. If your result is 4 pCi/L or higher, take a follow up test to be sure. Step 2. Depending on the results of your first test, follow up with either a long-term test or a second short term test.hort-term tests last from 2-90 days whereas long-term tests last from 91 days to 1 year. Various other dynamic testing methods are also available but are generally much more expensive to use. 1  Learn more about types of radon tests. 2  Order a radon test kit online from the American Lung Association of Oregon.