Gaithersburg, MD Radon Levels

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

Based on 2 user-submitted tests, the average radon level is 6.50 pCi/L.

Q: What EPA Radon Zone is Gaithersburg in?

Gaithersburg is in Montgomery County, EPA Zone 1.

Q: How much does radon mitigation cost in Gaithersburg?

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

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

Gaithersburg, MD Radon Facts

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

County Montgomery County, MD

Zip Code 20877

Avg. User Level 6.50 pCi/L

User Tests 2

This Washington metro suburb in Montgomery County reports radon levels averaging 6.5 pCi/L, well above the EPA's 4.0 pCi/L action threshold. Maryland's Piedmont province features crystalline bedrock formations that contribute to elevated radon production throughout the region. Residents across zip codes 20877-20882 should conduct professional testing and consider mitigation systems where necessary.

6.50

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Gaithersburg, MD Radon Mitigation

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Gaithersburg, MD Radon Levels

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

Radon Level	City	Home Age	Foundation
6 pCi/L	Gaithersburg, MD	21-50 Years	Full Basement
7 pCi/L	Gaithersburg, MD	0-20 Years	—

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Radon FAQ for Gaithersburg, MD

What is the average radon level in Gaithersburg, MD?

Based on 2 user-submitted tests, the average radon level in Gaithersburg is 6.50 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 Gaithersburg in?

Gaithersburg and the 20877 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 Gaithersburg?

Radon mitigation in Gaithersburg 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 Gaithersburg?

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
Clarksburg	8.00 pCi/L	3

Gaithersburg, MD Radon Levels

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

Gaithersburg, MD Radon Facts

Gaithersburg, MD Radon Mitigation

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Gaithersburg, MD Radon Levels

Radon FAQ for Gaithersburg, MD

Most Active Radon Markets in Maryland

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