Top 5 Radon Hotspots in the Baltimore Metro Area
Cities with the highest average user-submitted radon readings in the Baltimore Metro metropolitan area.
| Rank | City | Avg. Radon Level | Tests |
|---|---|---|---|
| 1 | Westminster |
14.50 pCi/L
|
4 |
| 2 | Baltimore |
7.00 pCi/L
|
4 |
| 3 | Annapolis |
4.30 pCi/L
|
4 |
| 4 | Havre De Grace |
14.70 pCi/L
|
3 |
| 5 | Edgewater |
12.70 pCi/L
|
3 |
Other Metro Areas in Maryland
Explore radon data for other metropolitan regions across the state.
Cities in the Baltimore Metro Area
36 cities and towns in the Baltimore Metro metropolitan area with user-submitted radon data.
36 cities
Forest Hill
Zone 1
20.0
pCi/L
Above EPA action level
Pikesville
Zone 1
20.0
pCi/L
Above EPA action level
Taneytown
Zone 1
20.0
pCi/L
Above EPA action level
Hanover
Zone 1
19.0
pCi/L
Above EPA action level
Harwood
Zone 1
19.0
pCi/L
Above EPA action level
Havre De Grace
Zone 1
14.7
pCi/L
Above EPA action level
Westminster
Zone 1
14.5
pCi/L
Above EPA action level
Mount Airy
Zone 1
14.0
pCi/L
Above EPA action level
Edgewater
Zone 1
12.7
pCi/L
Above EPA action level
Finksburg
Zone 1
11.0
pCi/L
Above EPA action level
Parkton
Zone 1
10.5
pCi/L
Above EPA action level
Cockeysville
Zone 1
10.0
pCi/L
Above EPA action level
Owings Mills
Zone 1
10.0
pCi/L
Above EPA action level
Crownsville
Zone 1
9.0
pCi/L
Above EPA action level
Dunkirk
Zone 1
9.0
pCi/L
Above EPA action level
Millersville
Zone 1
8.0
pCi/L
Above EPA action level
Baltimore
Zone 1
7.0
pCi/L
Above EPA action level
Hampstead
Zone 1
7.0
pCi/L
Above EPA action level
Elkridge
Zone 1
7.0
pCi/L
Above EPA action level
West Friendship
Zone 1
7.0
pCi/L
Above EPA action level
Gambrills
Zone 1
6.0
pCi/L
Above EPA action level
Lothian
Zone 1
6.0
pCi/L
Above EPA action level
Lutherville Timonium
Zone 1
6.0
pCi/L
Above EPA action level
Towson
Zone 1
6.0
pCi/L
Above EPA action level
Owings
Zone 1
5.5
pCi/L
Above EPA action level
Arnold
Zone 1
5.0
pCi/L
Above EPA action level
Jarrettsville
Zone 1
5.0
pCi/L
Above EPA action level
Nottingham
Zone 1
5.0
pCi/L
Above EPA action level
Sykesville
Zone 1
5.0
pCi/L
Above EPA action level
Severna Park
Zone 1
4.7
pCi/L
Above EPA action level
Annapolis
Zone 1
4.3
pCi/L
Above EPA action level
Chestertown
Zone 3
4.0
pCi/L
Below EPA action level
Crofton
Zone 3
4.0
pCi/L
Below EPA action level
Perry Hall
Zone 3
4.0
pCi/L
Below EPA action level
Union Bridge
Zone 3
4.0
pCi/L
Below EPA action level
Kingsville
Zone 3
2.5
pCi/L
Below EPA action level
Radon Mitigation Professionals Serving the Baltimore Metro Area
Licensed contractors who serve this metro area.
| Company | |
|---|---|
| ADE Radon Mitigation Services LLC | |
| Affordable Radon Reduction Inc | |
| APECS Inc | |
| Arundel Home Inspection LLC | |
| Avanty Construction Services | |
| Awareness Home Inspection Services LLC | |
| B-Sure Home Inspection Inc | |
| Buyers Protection Group | |
| Chesapeake Environmental Solutions | |
| Connor Environmental Services | |
| EBI Consulting | |
| G.M.D. Construction Inc | |
| Guardian Home Inspections LLC | |
| Harford Radon Consultants | |
| Home Advantage Home Inspections Inc | |
| J & P Home Inspection Services | |
| Mill Water Inc | |
| Pillar to Post Professional Home Inspection | |
| Sherlock Home Inspection Services | |
| Showalter Property Consultants | |
| SWAT Environmental Inc | |
| Target Radon | |
| US Inspect LLC | |
| US Inspect LLC | |
| Utz Plumbing Services LLC | |
| Vane Property Inspections | |
| Your Castle Home Inspections |
Frequently Asked Questions about Radon in the Baltimore Metro Area
Common questions about radon testing, mitigation costs, and health risks for homeowners in the Baltimore Metro metropolitan area.
Why are radon levels so high in the Baltimore Metro area?
Radon levels in the Baltimore 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 Baltimore Metro?
Professional radon mitigation in the Baltimore 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 Maryland required to test for radon?
Radon testing and disclosure requirements vary by state and municipality. Some Maryland 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 Baltimore Metro area?
Yes. High radon levels do not prevent a home sale, but buyers in the Baltimore 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.