Testing is the only way to know your home's radon level. Get connected with a local professional for a home or real estate radon test.
South Dakota DANR describes two types of tests: passive devices (such as charcoal canisters) that are inexpensive and are analyzed by a lab, and active electronic monitors that record hour-by-hour readings. Both are acceptable. Source: SD DANR
Want to do it yourself first? DANR offers a limited number of free radon test kits to South Dakota residents each year. If your result is 4 pCi/L or higher, the EPA recommends fixing your home.
Testing is the only way to know. South Dakota DANR notes that radon maps should not substitute for an actual test. DANR also offers a limited number of free test kits to South Dakota residents each year.
The U.S. EPA recommends fixing your home if radon is 4 pCi/L or higher, and suggests considering a fix between 2 and 4 pCi/L.
South Dakota DANR recommends the lowest livable level of the home, in a frequently used room without high humidity, such as a bedroom or family room.