Radon testing in Maryland and Baltimore.

Radon is odorless, colorless and the second leading cause of lung cancer in the United States. A short-term test during your inspection period is the only way to know the level in the property.

Radon testing

Much of Maryland sits on radon-producing geology.

Radon seeps from the soil into basements and lower levels through foundation cracks, sump openings and slab penetrations. Two identical houses on the same street can test very differently, so a test on the specific property is the only reliable answer.

What the numbers mean.

A result is only useful if you know what to do with it.

Below the action level

No mitigation indicated. Retest periodically, especially after foundation work or renovations.

At or above 4.0 pCi/L

The EPA recommends mitigation. During a purchase this is usually negotiable with the seller.

Mitigation works

A properly installed sub-slab depressurization system reliably brings levels down, usually within days.

Radon testing near you.

Baltimore City and County, Howard, Harford, Frederick and Montgomery County.

Radon coverage included.

Qualifying inspections carry Radon Protection Plus alongside our 125 day property warranty.

Common questions

Radon questions, answered.

Call Doug and the team on (410) 925-2088 or email clientcare@mdhi.com with anything else.

Should I test for radon when buying a property?

Yes. Radon cannot be seen or smelled, and levels vary house by house even on the same street. A test during your inspection period costs far less than mitigation negotiated after closing.

A short-term test runs a minimum of 48 hours under closed-house conditions. We place the monitor at the inspection and collect it when the test period ends.

The EPA action level is 4.0 pCi/L. Above that, mitigation is recommended. During a purchase, buyers commonly ask the seller to install a system or credit the cost, which is usually a few thousand dollars.

No. Closed-house conditions are required for a valid short-term test, which means windows and exterior doors stay shut except for normal entry and exit.

Add radon testing to your inspection.

One visit, one report, one less thing to worry about before closing.

MDHI