Derwood, MD Radon Mitigation and Testing

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.

Avg: 7.50 pCi/L

Montgomery County

EPA Zone 1

2 user tests

Derwood is located in Montgomery County, Maryland. With 2 user-submitted readings averaging 7.50 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 20855 zip code.

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

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Derwood, MD Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Derwood, Maryland Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
10 pCi/L	Derwood, MD	21-50 Years	Full Basement	Nov 2021
5 pCi/L	Derwood, MD	0-20 Years	Full Basement	Aug 2017

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

Derwood Radon Facts

Key details about the radon risk profile for Derwood and the 20855 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Montgomery County, MD

Zip Code

20855

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

7.50 pCi/L

User Tests Submitted

Derwood and the 20855 zip code are located in Montgomery County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

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 with the most user-submitted radon test data in the state.

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
Clarksburg	8.00 pCi/L	3
Gambrills	6.00 pCi/L	3
Elkton	5.33 pCi/L	3
Silver Spring	4.33 pCi/L	3
Chesapeake Beach	14.00 pCi/L	2
Cumberland	9.00 pCi/L	2
Frostburg	9.00 pCi/L	2
Owings	5.50 pCi/L	2
Huntingtown	4.50 pCi/L	2
Mc Henry	20.00 pCi/L	1
Mount Airy	20.00 pCi/L	1