Top 5 Radon Hotspots in the Washington Metro Area
Cities with the highest average user-submitted radon readings in the Washington Metro metropolitan area.
| Rank | City | Avg. Radon Level | Tests |
|---|---|---|---|
| 1 | Fredericksburg |
7.30 pCi/L
|
7 |
| 2 | Leesburg |
9.80 pCi/L
|
5 |
| 3 | Chantilly |
9.60 pCi/L
|
5 |
| 4 | Purcellville |
10.80 pCi/L
|
4 |
| 5 | Aldie |
8.00 pCi/L
|
4 |
Other Metro Areas in Virginia
Explore radon data for other metropolitan regions across the state.
Cities in the Washington Metro Area
40 cities and towns in the Washington Metro metropolitan area with user-submitted radon data.
40 cities
Amissville
Zone 1
20.0
pCi/L
Above EPA action level
Annandale
Zone 1
20.0
pCi/L
Above EPA action level
Round Hill
Zone 1
14.0
pCi/L
Above EPA action level
Purcellville
Zone 1
10.8
pCi/L
Above EPA action level
Sumerduck
Zone 1
10.0
pCi/L
Above EPA action level
Leesburg
Zone 1
9.8
pCi/L
Above EPA action level
Fairfax
Zone 1
9.7
pCi/L
Above EPA action level
Chantilly
Zone 1
9.6
pCi/L
Above EPA action level
Springfield
Zone 1
9.5
pCi/L
Above EPA action level
Stafford
Zone 1
9.3
pCi/L
Above EPA action level
Aldie
Zone 1
8.0
pCi/L
Above EPA action level
Stephens City
Zone 1
8.0
pCi/L
Above EPA action level
Front Royal
Zone 1
7.8
pCi/L
Above EPA action level
Linden
Zone 1
7.7
pCi/L
Above EPA action level
Warrenton
Zone 1
7.7
pCi/L
Above EPA action level
Bealeton
Zone 1
7.5
pCi/L
Above EPA action level
Fredericksburg
Zone 1
7.3
pCi/L
Above EPA action level
Spotsylvania
Zone 1
7.0
pCi/L
Above EPA action level
Gainesville
Zone 1
7.0
pCi/L
Above EPA action level
Hume
Zone 1
7.0
pCi/L
Above EPA action level
Manassas
Zone 1
7.0
pCi/L
Above EPA action level
Alexandria
Zone 1
6.0
pCi/L
Above EPA action level
Marshall
Zone 1
6.0
pCi/L
Above EPA action level
Burke
Zone 1
5.7
pCi/L
Above EPA action level
Haymarket
Zone 1
5.5
pCi/L
Above EPA action level
Lovettsville
Zone 1
5.3
pCi/L
Above EPA action level
Jeffersonton
Zone 1
5.0
pCi/L
Above EPA action level
Oakton
Zone 1
5.0
pCi/L
Above EPA action level
Woodbridge
Zone 1
4.5
pCi/L
Above EPA action level
Bristow
Zone 1
4.5
pCi/L
Above EPA action level
Sterling
Zone 1
4.3
pCi/L
Above EPA action level
Arlington
Zone 3
4.0
pCi/L
Below EPA action level
Ashburn
Zone 3
4.0
pCi/L
Below EPA action level
Beaverdam
Zone 3
4.0
pCi/L
Below EPA action level
Boston
Zone 3
4.0
pCi/L
Below EPA action level
Catlett
Zone 3
4.0
pCi/L
Below EPA action level
Centreville
Zone 3
4.0
pCi/L
Below EPA action level
Lorton
Zone 3
4.0
pCi/L
Below EPA action level
Vienna
Zone 3
4.0
pCi/L
Below EPA action level
Mineral
Zone 3
3.0
pCi/L
Below EPA action level
Radon Mitigation Professionals Serving the Washington Metro Area
Licensed contractors who serve this metro area.
| Company | |
|---|---|
| A + Home Inspection | |
| A to Z Inspection Services | |
| Able Building Insepction Inc | |
| Abode Check LLC | |
| All - Pro Services Inc | |
| AmeriHome Inspection Services | |
| Apex Companies LLC | |
| API Home Inspection Service | |
| Atlas Home Inspection | |
| Best Choice Home Inspections | |
| Blazek Building Inspection Services Inc | |
| Byler Home Inspections Inc | |
| Capital Inspection Services | |
| CJR Property Inspections | |
| CJR Property Inspections | |
| CSI of Virginia | |
| Dominion Radon LLC | |
| Donofrio Property Inspections Inc | |
| Drewry Home Inspections Inc | |
| Environmental Testing Corporation | |
| Fusion Services LLC | |
| Future Properties Inspections LLC | |
| Great Inspectation Home Inspection Services | |
| Guardian Home Inspections | |
| Hallmark Residential Services Inc | |
| Home Review Inspection Services LLC | |
| Home Status Inspection Co. LLC | |
| HomeWise Inspection Service | |
| Hurlbert Home Inspection | |
| JK Radon LLC | |
| Keystone Home & Environmental Services LLC | |
| NextDay Inspect | |
| Preferred Home Inspections LLC | |
| Pro-Spect Home Inspection Services Inc | |
| Protech Home Services Inc | |
| PT Home Inspections LLC | |
| Radon Control Professionals Inc | |
| Radon Control Professionals South Inc | |
| Radon Installation Contractors LLC | |
| Radon Solutions | |
| SWAT Environmental | |
| The Home Front | |
| ThoroSpec LLC | |
| Tom Barber & Associates | |
| U.S. Inspect | |
| URS Corporation | |
| US Inspect | |
| US Inspect LLC | |
| US Inspect LLC | |
| US Inspect LLC | |
| US Inspect LLC | |
| US Inspect LLC | |
| VA Home Inspect LLC | |
| Vertex Home Inspection LLC | |
| Virginia Inspection Service LLC | |
| We Inspect It LLC |
Frequently Asked Questions about Radon in the Washington Metro Area
Common questions about radon testing, mitigation costs, and health risks for homeowners in the Washington Metro metropolitan area.
Why are radon levels so high in the Washington Metro area?
Radon levels in the Washington Metro area are driven by the local soil and bedrock composition, which contains naturally occurring uranium. As uranium decays, it produces radon gas that migrates upward through the soil and enters homes through foundation cracks, sump pits, and gaps around pipes. Homes with basements and crawlspaces are especially susceptible because these below-grade spaces are in direct contact with the soil where radon concentrations are highest.
How much does radon mitigation cost in Washington Metro?
Professional radon mitigation in the Washington Metro metropolitan area typically costs between $800 and $2,500, depending on the size and construction of your home. The most common approach is an active sub-slab depressurization system, which a certified contractor can usually install in a single day. Ongoing energy costs for the mitigation fan are minimal—roughly $5–$10 per month—and most systems reduce radon levels by 90% or more.
Are landlords in Virginia required to test for radon?
Radon testing and disclosure requirements vary by state and municipality. Some Virginia jurisdictions require landlords to disclose known radon levels or test results, while others have no mandate. Regardless of local law, the EPA recommends radon testing for all residential properties—including rentals—since radon is the second leading cause of lung cancer in the United States.
Can I sell a house with high radon levels in the Washington Metro area?
Yes. High radon levels do not prevent a home sale, but buyers in the Washington Metro market routinely request radon testing during the inspection period. If levels exceed 4.0 pCi/L, the buyer may negotiate for the seller to install a mitigation system before closing. Having a radon mitigation system already in place can actually be a selling point, demonstrating proactive home maintenance and providing documented proof of safe indoor air quality.