Published August 15, 2026
Radon Testing in Southern Maryland: A Small Test That Answers a Big Question
Radon Testing in Southern Maryland: A Small Test That Answers a Big Question
By Dawn Riley, Associate Broker, Realtor and Master Certified Negotiator
A beautiful finished basement does not tell you whether radon is present. Testing is a small due-diligence step that can answer a health and property question before settlement.
The smartest next step is to organize the facts early. Property details, written terms and timing all matter, and a local strategy can prevent a small assumption from becoming a closing-day problem.
A finished basement does not answer the question
Radon cannot be seen or smelled. Testing is the only practical way to measure the concentration inside a specific house.
Real-estate testing follows a protocol
Placement, closed-house conditions and device security matter. A qualified tester can document the process when the result may affect the contract.
High readings are often manageable
Mitigation systems can reduce indoor levels. Buyers should understand the proposal, electrical needs, vent location and the plan for follow-up testing.
Testing can help sellers too
A seller who tests early may have more time to obtain bids and complete work without rushing under an inspection deadline.
Questions Buyers and Sellers Ask
Can anyone detect radon without a test?
No. Radon is invisible and odorless, so testing is the only way to know the level.
Which level of the home is normally tested?
It is generally placed in the lowest level that could be regularly occupied, following the test provider’s protocol.
What result commonly leads to mitigation discussions?
EPA guidance commonly uses 4 picocuries per liter as the action level, while also noting that no radon level is completely risk-free.
Can a mitigation contractor lower the reading?
Yes. Qualified mitigation contractors can install systems designed to lower indoor radon levels.
Why test again after installing a system?
Yes. Post-mitigation testing confirms performance, and periodic retesting helps verify that the system continues to work.