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Home/Radon Testing/Prince William County/Dumfries, VA
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 Prince William County
A radon test in Dumfries 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. Pricing covers one Dumfries residence. If the request involves two separately occupied units or an accessory dwelling, describe both before booking so the team can quote the intended scope.
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 Dumfries.
Prince William County appears in EPA radon Zone 2, a county-scale category rather than a result for a Dumfries address. EPA says its map should not decide whether an individual home is tested. Identify the lowest level that could be used regularly, including unfinished space that may become living area. The technician selects a location away from drafts and disturbance, then reviews the device conditions with the access contact.
Prince William County GIS listed the Town of Dumfries separately from the county when checked on September 9, 2026. That jurisdiction distinction does not describe the dwelling or its radon level. Send the complete street address and unit, if any, and explain whether the lowest usable area belongs to the booked residence or sits behind a tenant boundary.
Local background: Prince William County GIS jurisdiction reference, checked September 9, 2026, Virginia Department of Health EPA radon risk map, EPA Map of Radon Zones and map limitations.
01
Plan at least 48 hours for the measurement itself, plus time for placement and retrieval. Avoid scheduling it across renovation work or a move that could disturb the device or prevent required building conditions.
02
Give the technician a reliable entry method for setup and collection, including gate, desk or lockbox directions. If an agent will attend one visit and an occupant the other, list both contacts.
03
Explain how the lowest level is used now and whether a lower room could be used regularly after the sale. Placement follows that household use question rather than a neighborhood assumption.
Where we test in Dumfries, and what to tell us
Williamstown, Forest Park
In Williamstown or Forest Park, reserve a period when movers, cleaners and contractors will not handle the monitor. Normal entry may continue, but the selected room must remain suitable for an undisturbed measurement.
Princeton Woods
For a Princeton Woods address, name the booked unit and any locked common entrance. A condominium appointment covers that residence, so access to another unit or shared mechanical room must be discussed separately.
Four Seasons in Historic Virginia
At Four Seasons in Historic Virginia, tell the scheduler whether the property is occupied, vacant or between owners. That detail determines who will receive preparation instructions and who can document conditions at pickup.
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.
Keep the device area clear, maintain normal heating or cooling and follow the appointment instructions. Finish cleaning, repairs and furniture moves before setup.
Ask who can authorize unit entry for both visits and whether management has an equipment procedure. Pass those details to the team before placement.
Leave it where the technician placed it. If someone shifts, covers or unplugs the device, record the event and contact the team for an evaluation.
Allow for scheduling, setup, a minimum 48-hour measurement, collection and the written result. Share the deadline when booking so availability can be assessed.
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
