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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 all of Clarke County
Schedule a radon test Call (703) 450-6398 Find your community
One community in the county has a page of its own with local detail. The test, the price and the technicians are the same across the county, so you can book from either page.
Clarke County says Berryville was settled in 1775, incorporated in 1798, and is the county center of commercial, residential, institutional, and industrial activity.
A radon test in Clarke County 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. One residence is included in the standard price. List other dwellings or units so the team can confirm whether the scope changes.
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 Clarke County.
Clarke County is in EPA Zone 1, a higher-potential area classification. Berryville's local identity and the county color cannot reveal the concentration inside a particular dwelling. The home's monitor record provides that evidence.
Berryville is the local community linked from the Clarke County page. Use the complete address and describe the individual residence, including its lowest level that could be used regularly. If another dwelling or unit also needs a result, include it when requesting the scope.
Local background: EPA Map of Radon Zones raw county data, EPA Map of Radon Zones guidance, Berryville local source.
01
The county map indicates higher estimated potential at a broad scale. The technician uses the actual dwelling and its lowest regularly usable level to choose placement, then the device records the answer.
02
Clarke County identifies Berryville as its center of commercial, residential, institutional and industrial activity. The technician still plans from the individual home.
03
Tell the technician about severe conditions, repairs or HVAC changes rather than moving the monitor or trying to correct the reading.
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.
Virginia's residential disclosure statute directs the seller's disclosure statement to say that the owner makes no representation about whether the property is in an EPA Zone 1 or Zone 2 locality. It directs buyers to use due diligence, including reviewing EPA, Virginia Department of Health and NRSB information and ordering a radon inspection before settlement as the contract allows.
Va. Code section 55.1-703. Current as of September 2026. General information, not legal advice.
Zone 1 supports taking radon seriously across Clarke County. It does not reveal a Berryville or other property's concentration and cannot replace testing.
Provide the full address and access contact, identify the lowest regularly usable level and start closed conditions 12 hours before placement. Keep the monitor undisturbed through collection and tell the technician about planned repairs or ventilation changes.
Describe the lowest indoor level that could become regular living, working or recreation space. The technician reviews the actual layout and selects a protocol-compliant location rather than inferring one from the Berryville name or Zone 1 map.
Tell the technician about severe conditions, exterior construction, HVAC changes or other events that could disturb the planned indoor environment. Do not relocate the monitor or improvise a correction. The event can be documented and the collected data evaluated with the actual circumstances.
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
