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Frederick, MD Radon Levels

Check local Frederick radon levels and find certified testing and mitigation professionals to keep your home safe


Frederick, MD Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
County Frederick County, MD
Zip Code 21701
Avg. User Level 8.30 pCi/L
User Tests 7

Homeowners in Frederick County face significant radon concerns, with local testing showing an average level of 8.29 pCi/L that notably exceeds the EPA action threshold. The underlying limestone and metamorphic bedrock of the Maryland Piedmont region creates geological conditions that promote radon gas migration into homes. With Frederick's mix of established neighborhoods and newer developments in zip codes 21701-21704, residents across all housing types should prioritize radon testing and mitigation.

8.30
pCi/L average
Above EPA Action Level

Based on 7 user-submitted radon tests for homes in Frederick, MD. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

Frederick, MD Radon Mitigation

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Frederick, MD Radon Levels

User-submitted radon test readings from homes in the Frederick area.

Radon LevelCityHome AgeFoundation
6 pCi/L Frederick, MD 0-20 Years Full Basement
5 pCi/L Frederick, MD 51-99 Years Full Basement
9 pCi/L Frederick, MD 0-20 Years No Basement/All Slab
12 pCi/L Frederick, MD 0-20 Years Full Basement
10 pCi/L Frederick, MD 0-20 Years

Have a radon test result for Frederick? Submit your reading to help other homeowners.

Radon FAQ for Frederick, MD

What is the average radon level in Frederick, MD?
Based on 7 user-submitted tests, the average radon level in Frederick is 8.30 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.
What EPA Radon Zone is Frederick in?
Frederick and the 21701 zip code are in Frederick County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.
How much does radon mitigation cost in Frederick?
Radon mitigation in Frederick typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
Should I test for radon if I'm buying a home in Frederick?
Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Maryland

Cities in Maryland with the most user-submitted radon test data, ranked by number of submissions.

CityAvg User Radon LevelSubmissions
Frederick 8.29 pCi/L 7
Potomac 9.00 pCi/L 6
Hagerstown 8.67 pCi/L 6
Westminster 14.50 pCi/L 4
Baltimore 7.00 pCi/L 4
Annapolis 4.25 pCi/L 4
Upper Marlboro 15.00 pCi/L 3
Edgewater 12.67 pCi/L 3
Bowie 9.00 pCi/L 3
Frostburg 8.67 pCi/L 3