Skip to content
Home/Radon Testing/Charles County/La Plata, 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 Charles County
A radon test in La Plata 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 covers one La Plata residence. Book online or call with the address, unit and access contact, and request a separate scope for any additional dwelling.
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 La Plata.
Charles County is in EPA Zone 2, a county category for moderate predicted average radon potential. EPA also says elevated homes can occur in every zone and its map should not determine whether an individual home is tested. For a La Plata decision, rely on a measurement made in the property. Describe the lowest level that could be used regularly, including future use, without assuming a foundation type from the neighborhood.
Charles County's comprehensive plan identifies La Plata as the county seat and one of the County's three incorporated towns. Municipal status sets the local context but does not describe every residence. Supply the complete address and current layout, identify whether the property is a house or individual unit, and arrange any owner, agent, tenant or management access required for both visits. Incorporated-town records and county records may both appear in a transaction file, yet the testing report should identify the same street address and dwelling the parties are evaluating. Ask the listing representative to disclose lockbox restrictions, alarms and animals before arrival. If an accessory space has its own kitchen, tenant or entrance, describe those facts neutrally so the company can decide whether it is another residence rather than promising that one device covers both. A municipal address can involve seller disclosures, county forms, brokerage documents and utility accounts. Compare them for the correct street number and unit before the order is placed. Note whether the tested premises are owner occupied, rented or vacant, then specify who will receive preparation instructions. When settlement counsel or a relocation coordinator needs the report, add that delivery request without changing the fact that the instrument measures one identified residence. Town incorporation likewise does not determine whether an address has an association, shared entrance or secondary household. Check those items directly. A detached listing may have a lockbox and alarm; a managed unit may require desk registration; a rental may need advance notice. State the applicable arrangement and omit irrelevant categories. Focused instructions reduce missed access, preserve the agreed testing interval and keep the report connected to the dwelling named in the purchase or lease file. Keeping civic identity, legal premises and instrument location distinct helps the final report remain understandable to purchasers, landlords, counsel and future occupants reviewing the file.
Local background: Charles County Comprehensive Plan history section, Maryland Department of Health radon guidance, EPA Map of Radon Zones.
01
The County identifies La Plata as its seat, which is civic context only. An indoor measurement at the individual property supplies the result.
02
An accessory apartment or other separate residence does not automatically share the main home's test. Describe each living unit when requesting service.
03
Agent or occupant arrangements must cover device placement and later retrieval. Confirm both visits when choosing dates around a contract deadline.
Where we test in La Plata, and what to tell us
Clarks Run, King's Grant
When an address includes a distinct apartment or tenant area, identify the exact dwelling that needs the report. Provide permission and entry details for that residence rather than treating the whole address as one space.
Quailwood, Oak Grove Estates
Show the technician lower rooms that could become routinely occupied, even if they are unfinished today. The current layout and planned use guide placement, not an assumption based on the subdivision.
Hickory Ridge, The Villages of Steeplechase
For a transaction, settle lockbox, agent or occupant access before placement. Choose dates without contractors or moving activity that could disturb the monitor or the required conditions.
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. County-seat status describes local government, not indoor radon. Test the particular La Plata residence and use its report for the decision.
It may need a separate measurement because it is a distinct dwelling with its own accessible rooms and occupancy. Describe both units when requesting service so the scope can be confirmed.
Arrange reliable property entry for placement and retrieval, clear access to the relevant lower rooms, and avoid scheduling contractors or moving work during the measurement.
Yes. Tell the technician if the room could become a bedroom, office, gym or play area. Potential regular use helps determine which level should be measured.
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
