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Home/Radon Testing/Montgomery County/Potomac, MD
Radon testing
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
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
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
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
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.
Montgomery County is in EPA Zone 1. This county-level estimate does not supply a Potomac home indoor concentration, and EPA recommends testing individual residences. Use the property report for the decision. Show the technician the lowest space that could be occupied routinely, including a lower room expected to change use after a purchase or renovation.
Montgomery Planning's 2024 Potomac review notes that dwelling units were approved at Park Potomac on land originally designated for office use. For a completed Park Potomac residence, confirm the unit and who authorizes entry. Provide the desk procedure, elevator or parking instructions and pickup access for a managed building. For a larger Potomac property, define the one dwelling included rather than adding outbuildings or another household by assumption. If work is planned, choose dates when ventilation and access will be stable.
Local background: Montgomery Planning 2024 Potomac subregion review, Park Potomac site, Maryland Department of Health radon guidance, EPA Map of Radon Zones.
01
Before booking, verify the specific residence is complete and ready for normal occupancy conditions, then provide its unit and authorized access contact.
02
A main home, guest dwelling or other occupied unit may require distinct authorization and placement. State which residence needs the report.
03
A scenic road, creek or river reference can help locate an address but cannot establish subsurface conditions or an indoor reading.
Where we test in Potomac, and what to tell us
Potomac Village
For a house, identify regularly used low rooms and any separate living quarters. Arrange owner, occupant or agent entry without assuming a neighborhood-wide building form.
Park Potomac
The 2024 review documents approved residential use at this specific site. For an existing unit, give its building, number and management procedures for placement and retrieval.
Rustic-road properties near Seneca Creek and the river
Road or river proximity does not predict radon or foundation type. Supply practical directions if needed and let the interior layout guide measurement placement.
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.
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.
Yes, when the residence exists, the owner or another authorized party can provide access for both visits, and ordinary measurement conditions can be maintained. Confirm the specific unit rather than relying on a development approval.
Provide the building and unit, front-desk or parking process, and a contact who can authorize entry for both placement and retrieval.
Do not assume so. A separate residence may need its own defined scope, access and measurement location, so describe both dwellings when requesting service.
No. Geographic proximity does not predict the home's radon level. Test the residence involved in the decision.
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
