Derwood, MD Radon Levels

Q: What is the average radon level in Derwood, MD?

Based on 2 user-submitted tests, the average radon level is 7.50 pCi/L.

Q: What EPA Radon Zone is Derwood in?

Derwood is in Montgomery County, EPA Zone 1.

Q: How much does radon mitigation cost in Derwood?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

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

Derwood, MD Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Montgomery County, MD

Zip Code 20855

Avg. User Level 7.50 pCi/L

User Tests 2

Located in Montgomery County within the Washington Metro area, Derwood sits in zip code 20855 where the underlying Piedmont geology contributes to elevated radon potential. Recent testing data shows an average radon level of 7.5 pCi/L, significantly exceeding the EPA action level of 4.0 pCi/L. Given the prevalence of split-level and colonial homes with finished basements throughout this established suburban community, homeowners should prioritize professional radon testing and mitigation if needed.

7.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Derwood, MD. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Derwood, MD Radon Mitigation

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Derwood, MD Radon Levels

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

Radon Level	City	Home Age	Foundation
10 pCi/L	Derwood, MD	21-50 Years	Full Basement
5 pCi/L	Derwood, MD	0-20 Years	Full Basement

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Radon FAQ for Derwood, MD

What is the average radon level in Derwood, MD?

Based on 2 user-submitted tests, the average radon level in Derwood is 7.50 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 Derwood in?

Derwood and the 20855 zip code are in Montgomery 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 Derwood?

Radon mitigation in Derwood 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 Derwood?

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.

City	Avg User Radon Level	Submissions
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

Derwood, MD Radon Levels

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

Derwood, MD Radon Facts

Derwood, MD Radon Mitigation

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Derwood, MD Radon Levels

Radon FAQ for Derwood, MD

Most Active Radon Markets in Maryland

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