Radon Testing in Sioux Falls
South Dakota's DANR gives away free radon test kits and publishes exact rules for where to put one. Here's how to run a test in your Sioux Falls home.
South Dakota DANR
Free test kits
DANR provides 500 free radon test kits to South Dakota residents, which you can request from its radon page.1 Passive kits are also sold at some hardware stores and online.1
Two kinds of tests
- Passive devices need no power and are very inexpensive, but usually need lab analysis and don't show changes during the test. Charcoal canisters, alpha track detectors and electret ion chambers are examples.1
- Active monitors use electronics to give hour-by-hour readings. They cost more to run but usually give results right away.1
DANR says both are acceptable, as long as the test meets EPA proficiency standards.1
Where to put the kit
DANR says to place it on the lowest livable level, in a room that's used often but isn't humid, such as a bedroom or family room.1
| Keep the device at least | Distance |
|---|---|
| Above the floor1 | 20 inches |
| From other objects1 | 4 inches |
| From an exterior wall1 | 12 inches |
| From an outside window1 | 3 feet |
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Keep exterior doors and windows shut for 12 hours before and during the test, except for normal coming and going. Turn off fans and blowers. Air conditioning is fine, but not on the fresh-air setting.1 When the test ends, send the kit back to the lab.1
What your result means
EPA recommends against long-term exposure above 4 pCi/L, DANR notes.1 EPA also suggests considering a fix between 2 and 4 pCi/L, since any radon carries some risk.2
Hiring a tester
For a home sale or a second opinion, DANR links to residential measurement providers certified by NRPP and NRSB.1
Common questions
Can I get a free radon test kit in Sioux Falls?
Yes, while supplies last. South Dakota DANR provides 500 free radon test kits to state residents.
Where should I put a radon test kit?
DANR says the lowest livable level, in a frequently used, non-humid room, at least 20 inches off the floor, 12 inches from exterior walls and 3 feet from windows.
Do I need to keep windows closed during a radon test?
Yes. DANR says to keep exterior doors and windows closed for 12 hours before and during the test, except for normal coming and going.
Is a digital radon monitor acceptable?
DANR says both passive and active tests are acceptable, as long as the test meets EPA proficiency standards.
General information summarized from the public sources listed below. It isn't professional, medical or legal advice. A licensed professional who inspects your home can tell you what it needs.