Skip to content
Home/Radon Testing/Baltimore County/Dundalk, 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 Baltimore County
A radon test in Dundalk 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 home-test rate applies to one Dundalk residence. Book online or call to confirm scope for a separate unit or an address with more than one household.
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 Dundalk.
Baltimore County is listed in EPA Zone 1, its highest predicted-potential category. The map is county-wide and does not tell a Dundalk resident what is inside one home. Test the address and use its report. The technician needs access to the lowest level that could be regularly occupied, including a planned office, bedroom or recreation room, without assuming any foundation from the community name.
Baltimore County identifies Dundalk as an unincorporated community. That identity was checked September 10, 2026; it supports no generalized claim about housing type or building age. Focus on the present premises. Give the street address, distinguish the main household from any separate apartment, and explain who controls each entrance. If a row of attached residences looks similar, do not extend one report across property lines. At a rental, coordinate owner permission and tenant notice. At a sale, avoid overlapping the measurement with movers, contractors, staging or frequent showings. For an empty house, designate a keyholder and maintain ordinary operation. Attached properties can create address errors when neighboring doors, rear entries or unit suffixes look similar. Verify the number at the entrance and match it to the order before equipment is placed. If a basement stair crosses into a landlord-controlled space, settle permission rather than assuming household access. In an estate, foreclosure or relocation, identify the party empowered to authorize entry. If occupants work overnight, select a place and schedule that respect normal use while protecting the instrument. These checks help produce a defensible record for one Dundalk dwelling without claiming that unincorporated status explains its structure. For adjoining row addresses, repeat the house number during every access exchange. This simple verbal check prevents a key or technician from being directed to the neighboring household.
Local background: Baltimore County community information, checked September 10, 2026, Maryland Department of Health radon guidance, EPA Map of Radon Zones.
01
Baltimore County's identity page supports Dundalk's community status, not a construction or radon claim. The full address remains the practical service identifier.
02
Shared walls or a repeating exterior design do not make one household's measurement transferable to another. Test the residence involved in the decision.
03
Explain the measurement dates and tell occupants not to move, unplug or cover the monitor. Arrange authorized retrieval at the same time.
Where we test in Dundalk, and what to tell us
The original Dundalk Company streets
A historic-sounding street grouping does not establish a house's age or indoor level. Use the current floor plan and identify potentially occupied rooms on the lowest accessible level.
St. Helena
For attached housing, confirm the exact street number and household. A neighboring residence's result does not represent the booked property, even when exterior forms resemble one another.
Turner Station
If a tenant, family member or property manager controls a lower area, obtain permission before the visit. State whether it is part of the same dwelling or a separate residence.
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.
No. It describes local government and community identity. The technician follows the same measurement protocol in the specific residence and uses its actual layout.
No. A report documents the dwelling where the device was placed. Each adjoining residence needs its own authorized scope and measurement.
Provide required notice, obtain permission, arrange entry for both visits and tell the tenant how to protect the monitor throughout the testing period.
Explain whether it is part of the main household or a separately occupied dwelling. That distinction lets the company confirm authorization, placement and whether another test is needed.
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
