How does a professional test for radon?
A professional tests for radon by selecting and placing an appropriate measurement device, documenting the exposure period and interpreting the result. Air Sense describes calibrated equipment in its testing service. Ask which device and reporting method apply to your appointment; this page does not assume a particular monitor model.
- Confirm the purpose of the test.
- Request written preparation instructions.
- Ask when the report will be available.
What happens during a radon inspection?
A radon inspection should produce a measurement record, not only a visual opinion about the basement. During booking, ask who will place and collect the device and how access is arranged.
Review the report for the address, tested room, dates, units and reported result. If those details are unclear, request an explanation before comparing the number with another test. Keep the entire report rather than saving only a screenshot of the final value.
Is radon testing really necessary?
Testing is the way to determine whether radon is elevated in your home. You cannot establish the result from a smell, a photograph or the fact that the house is newly built. CDC recommends testing when levels are unknown and around important changes in home use.
If a basement is becoming a bedroom or office, mention that plan before the measurement location is chosen.
Is Missouri a high radon state?
Missouri has a state radon program and publishes testing resources because elevated radon is a household issue worth measuring. A statewide label does not determine the result at a St. Louis address.
Use a map to understand the program’s information, then test the individual building. Do not treat a neighbor’s result as a substitute for yours or assume a lower-risk map category means testing is unnecessary.
What time of year is best to test for radon?
The best time to arrange a radon test is when you can follow the selected protocol correctly. A short measurement represents its exposure period; it cannot establish which month is always highest in your particular house.
Discuss seasonal concerns with the tester rather than delaying indefinitely. If your question is about year-round exposure, ask whether a longer measurement would add useful information.
- Explain travel or vacancy periods.
- Mention planned ventilation changes.
- Separate a sales deadline from a long-term exposure question.
Can you live in a house during a radon test?
You can generally continue ordinary household occupancy during a radon test while following the tester’s instructions. Access to the device and required building conditions matter more than an empty house.
Tell everyone in the home not to move or disturb the device. Report any departure from the instructions so the tester can decide whether it affects the result.
- Keep the device in its assigned position.
- Follow window and exterior-door instructions.
- Record equipment interruptions or unusual events.
What does a radon test cost in St. Louis?
Ask Air Sense for the price of your specific radon test before scheduling. Air Sense’s testing guide gives a regional starting figure of about $140, but your service price, property and report requirements must be confirmed. A general household screen and a transaction with a fixed deadline should not be assumed to have identical scope.
What Air Sense customers say
Excerpts from Google reviews of Air Sense Environmental, quoted as written. Reviewer names are withheld; each link opens the full review on Google.
“I use Air Sense Environmental for my radon testing needs. A great company to work with and their reports are quick and look excellent!”
Google review, August 2024 · Read the full review on Google
“From scheduling, testing, giving prompt results and then following up to ensure we had a full understanding of the report, the overall experience far exceeded my expectations!”
Google review, March 2024 · Read the full review on Google
“Brendon, their radon testing technician is also very helpful and explains the details of the test.”
Google review, April 2026 · Read the full review on Google
See all 167 Google reviews of Air Sense Environmental (rated 5.0 as of October 10, 2026)
Radon Testing
Questions St. Louis homeowners ask before booking.
A radon measurement answers a radon question. Ask separately about any other concern rather than assuming a radon report includes a broad indoor-air assessment.
Yes. Have the full report ready for discussion, including the date, location and test method.
Tell the tester what happened and when. Let the tester determine whether the measurement remains usable.
EPA recommends fixing a home at 4 pCi/L or higher and considering a fix between 2 and 4 pCi/L. After a high short-term result, EPA advises a follow-up test before deciding, then a mitigation assessment.
Air Sense's testing guide gives a regional starting figure of about $140. Call 314-664-9807 for the price of your specific test, property and report requirements.
Radon does not cause immediate symptoms such as headaches or coughing. The established health risk is lung cancer from long-term exposure, which is why a test is the only way to know your level.
A kit can screen a home you live in. A professional test adds documented placement and a report, which matters for a sale or a decision about mitigation. Compare both in our test kit vs professional guide.
Test any home you have not tested, and retest after major renovations or a change in how you use the lowest level. EPA recommends retesting a mitigated home at least every two years.