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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 Washington 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.
Hagerstown describes Oak Hill as an early-to-mid-20th-century residential historic neighborhood.
A radon test in Washington 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. The standard amount covers one residence. Multiple houses, units or buildings require a property list and confirmed price.
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 Washington County.
Washington County is listed in EPA Zone 1. That broad category cannot provide a Hagerstown or outlying property's concentration. The written report from the monitor location and collection dates gives the address-specific result.
Hagerstown is the local community linked from the Washington County page. Readers at other county addresses can provide the full property location when booking online or calling. Identify the residence, its lowest regularly usable level and any additional dwelling included in the request. Hagerstown provides the hub's city-specific historic and housing context.
Local background: EPA Map of Radon Zones raw county data, EPA Map of Radon Zones guidance, Hagerstown local source.
01
The EPA row describes broad potential across the county. A Hagerstown or outlying address needs its own monitor record, dates and placement before anyone interprets a home-specific result.
02
Keep the address, monitor location, dates and condition notes with the result when sharing it with a buyer, tenant or contractor.
03
For a portfolio or comparison, identify each residence and access contact so placement, pickup and reporting can be planned separately.
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.
Zone 1 is an area estimate and supports testing rather than assumption. The written Washington County report supplies the actual value for the monitored residence.
Use this county page and give the full property address when booking online or calling. Hagerstown is the linked local destination, while other county residences are still planned from their own layout, occupancy and access details.
The relevant starting point is its lowest regularly usable level. Share how the area functions and any access limitation; the technician then selects the monitor location under the measurement protocol.
Yes, but preserve its address, measurement dates, monitor location and condition notes so the recipient understands its scope. The document records one collection period in one residence. A later occupant can use that context when deciding whether a new measurement is appropriate.
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
