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Radon testing

Radon Testing in Potomac, MD

A continuous monitor on the lowest level that could be used regularly, read every hour for at least 48 hours. The written result comes the day we collect it.

4.9 rating, over 4,000 reviews NRSB-certified technicians Serving Montgomery County

Schedule a radon test Call (703) 450-6398

What our customers say

From our customer reviews.

Great work! Radon test was smooth and we got our results back on the same day. Highly recommend!

They conducted the test right away and kept me informed every step of the way.

They arrived the day after I called, on time, set up the Radon test and left within 5 minutes.

Everything was handled so professionally, quickly and so easy to have our house tested for radon.

They found elevated radon in the home and numerous issues on the home inspection report which were remedied before I moved in.

How much does radon testing cost in Potomac?

A radon test in Potomac is $185, or $175 when it is added to a home inspection. That is the whole price: both visits, the monitor for the full 48 hours, and the written report with every hourly reading in it. The standard home-test rate applies to one Potomac residence. Book online or call to define additional dwellings, controlled entrances or multi-unit work.

Day 1

Drop-off

We place the monitor

A technician places it on the lowest level that could be used regularly, following EPA placement limits and the intended use of the space, inside a two-hour arrival window. With a home inspection, placement happens during the inspection visit.

48 hours

The house stays closed

The monitor does the work

For a short-term real-estate test, EPA guidance calls for closed-building conditions for at least 12 hours before the test and throughout the measurement. Windows stay closed, exterior doors open only for normal entry and exit, and the monitor logs hourly readings that help document the test conditions during the minimum 48-hour measurement.

Day 3

Pick-up and report

We collect it, read it, and write it up

A technician picks the monitor up in another two-hour window and pulls the full record on the spot. The written report reaches you the same day.

NRSB-certified technicians. Our own team, certified by the National Radon Safety Board, not a subcontractor.

EPA testing guidance. Placement, closed-house conditions and the 48-hour minimum follow it, and your average is read against the EPA action level of 4.0 pCi/L.

Continuous monitors. Airthings Corentium Pro instruments, logging every hour for the whole test.

Appointment times are requests until our team confirms them. What the number means, how to prepare the property and the eight questions everyone asks are on the radon testing page; this page is about Potomac.

Radon testing for Potomac houses and private units

A Potomac home needs a property-specific radon measurement. Montgomery County map data and another address's report cannot establish the indoor level in a house, townhouse or condo. Describe the lowest room used or suitable for regular occupancy, including a basement office, bedroom or family space planned after purchase. If a property includes a guest dwelling or separate apartment, identify each residence that needs a result before scheduling.

Give the full Potomac address and a contact authorized for monitor placement and collection. For a managed Park Potomac unit, include the building, unit, parking and desk or elevator procedures for both visits. For a house, supply any gate, alarm or driveway instructions. The monitor remains undisturbed for at least 48 hours while occupants follow closed-house instructions. Share a contract deadline early enough for pickup and the written report.

Radon testing guidance: Maryland Department of Health radon guidance, EPA radon-zone map guidance, EPA guide for home buyers and sellers.

One dwelling's result

A county map or neighboring property cannot measure this home.

Guest residence

A separate dwelling may require additional testing scope.

Access twice

Confirm gate or building instructions for setup and pickup.

Where we test in Potomac, and what to tell us

Potomac Village
Describe current and planned use of lower rooms.
Park Potomac
Provide the exact unit and managed-building entry details.
Properties near Seneca Creek
Identify every dwelling needing a result and supply arrival instructions.

We only perform testing, not mitigation.

We do not install radon systems, so we have nothing to gain from your number. If the result is at or above the EPA action level of 4.0 pCi/L, you choose who fixes it. Once the system is in, we can test again and tell you what it reads.

Before you book in Maryland

Maryland's residential disclosure framework includes radon among the hazardous or regulated materials covered by an owner's actual knowledge for certain single-family residential property of four or fewer units. The statute has enumerated exemptions and does not itself require a radon test. County and municipal requirements may differ, so check the rules for the property's location and type before relying on an existing result.

Md. Real Property section 10-702. Current as of September 2026. General information, not legal advice.

Radon testing near Potomac

Nearby

Radon testing in Potomac, answered straight

Can a Potomac neighbor's result answer for my house?

No. Test the specific residence involved in the decision for its own indoor radon level.

What should I provide for a Park Potomac unit?

Give the building and unit number, an authorized contact, and parking, desk or elevator instructions for both visits.

Can a guest dwelling share the main house's report?

A separate dwelling may need its own result. Tell us before booking so scope, access and price can be confirmed.

Which lower room matters after a purchase?

Tell the technician about the lowest room suitable for regular use, including a planned bedroom or office.

Book a radon test in Potomac

Book online or call (703) 450-6398.

Schedule a radon test Request a price

NextDay Inspect
46179 Westlake Dr, Ste 200, Sterling, VA 20165
(703) 450-6398