Home/Radon Testing/Prince William County, VA
Radon testing
Radon Testing in Prince William County, VA
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 Prince William County
Schedule a radon test Call (703) 450-6398 Find your community
What our customers say
From our customer reviews.
They conducted the test right away and kept me informed every step of the way.
Rachel RaphaelRadon testing
View on Google They arrived the day after I called, on time, set up the Radon test and left within 5 minutes.
Catherine HRadon testing
View on Google Everything was handled so professionally, quickly and so easy to have our house tested for radon.
Alma PrinceRadon testing
View on Google They found elevated radon in the home and numerous issues on the home inspection report which were remedied before I moved in.
Shawn McCallRadon testing
View on Google Great service, very thorough inspection and highlighted items in a very approachable and organized manner.
Elizabeth Anne NewberryCustomer review
View on Google Where we test in Prince William County
Nine communities across the county have a page of their own with local detail. The test, the price and the technicians are the same in every one of them, so you can also book straight from here.
Along the tidal Potomac and the Occoquan
- Woodbridge
A 2025 Prince William County environmental assessment names The Landing at Mason's Bridge Apartments, Rivergate Apartments, and an existing apartment building in North Woodbridge.
- Dumfries
Prince William County GIS enumerates the Town of Dumfries separately from Prince William County.
- Lake Ridge
Prince William County's CAPER lists Riverwoods at Lake Ridge, Dominion Lake Ridge, and Springwoods Lake Ridge Apartments.
- Montclair
A 2024 Prince William County environmental assessment identifies Montclair as a census-designated place.
Dale City and the county's two independent cities
- Dale City
Prince William County history says Dale City formally opened on June 19, 1965 and records 1965 townhouse/multifamily rezonings.
- Manassas
Manassas says Manassas was officially chartered in 1873 and residential and business growth followed the 1894 move of the county seat.
- Manassas Park
Manassas Park is an independent City in Virginia.
Gainesville and Haymarket toward the Bull Run Mountains
- Gainesville
A Prince William County 2021 mobility report says a large townhouse development occurred in Gainesville East on Limestone Drive.
- Haymarket
Prince William County premise-GIS jurisdiction values list the Town of Haymarket separately from Prince William County.
Manassas and Manassas Park are independent cities, while Dumfries and Haymarket are incorporated towns within Prince William County. The full property address determines which jurisdiction applies.
How much does radon testing cost in Prince William County?
A radon test in Prince William 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 listed service is for one residence. Multiple units, separate dwellings or several properties may require a different scope and price.
Day 1
Drop-off
We place the monitor
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
The monitor does the work
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
We collect it, read it, and write it up
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 Prince William County.
What the ground does under Prince William County homes
EPA's county data places Prince William County in Zone 2. The zone map describes area potential and cannot predict an individual home's reading. Manassas and Manassas Park are independent cities outside County jurisdiction, so a County label should not be assigned to those city addresses.
Prince William sources identify apartments, townhouses and detached-home settings in specific communities. The directory connects Woodbridge, Dumfries, Lake Ridge and Montclair near the Potomac and Occoquan, Dale City, and Gainesville and Haymarket farther west. Manassas and Manassas Park are independent cities. For testing, describe the selected dwelling and any separate apartment, including who can admit the technician to each requested residence.
Local background: EPA Map of Radon Zones raw county data, Prince William County small area plans, Woodbridge local source, Dumfries local source, Lake Ridge local source, Montclair local source, Dale City local source, Gainesville local source, Manassas local source, Manassas Park local source.
01
What Prince William's Zone 2 map label means
Prince William County's Zone 2 row is area-screening information. It does not supply a Woodbridge, Lake Ridge, Gainesville or other property result.
02
Independent cities require their own geography
Manassas and Manassas Park are independent cities. Confirm the full address before applying County background or naming the jurisdiction.
03
Local housing examples stay local
Apartment, planned-community and townhouse evidence is tied to named places. The technician bases placement on the residence being measured.
We only perform testing, not mitigation.
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.
Before you book in Virginia
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.
Radon testing near Prince William County
Nearby
Radon testing in Prince William County, answered straight
Does Prince William County's Zone 2 label tell me my home's result?
No. EPA says the map is a screening tool and should not predict an individual home. A measurement inside the property provides its result.
Are Manassas and Manassas Park part of Prince William County for radon geography?
No. Manassas and Manassas Park are independent Virginia cities. Confirm the jurisdiction from the complete address before applying Prince William County background; the residence still needs its own measurement.
What does a Lake Ridge or Dale City community label establish?
It identifies local context, not a concentration or foundation type. County history can describe a planned community, while the residence still needs its own measurement.
Can one Prince William test cover several residences?
The standard service covers one residence. Separate units, dwellings or buildings may need additional monitors and a confirmed scope and price. Book online or call with the complete property list.
Book a radon test in Prince William County
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