Markham, VA Radon Levels

Q: What EPA Radon Zone is Markham in?

Markham is in Fauquier County, EPA Zone 2.

Q: How much does radon mitigation cost in Markham?

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

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

Markham, VA Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Fauquier County, VA

Zip Code 22643

Nestled in Fauquier County within the Washington Metro area, Markham is characterized by rolling Piedmont geology with crystalline bedrock that can produce variable radon levels across different neighborhoods. Testing data for this zip code 22643 community remains limited, making individual home testing essential for residents. Given Virginia's complex geological landscape and the mix of older and newer construction styles common to the region, professional radon testing provides the only reliable way to determine your home's specific risk level.

Markham, VA Radon Mitigation

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

Need Radon Mitigation or Testing in Markham?

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Radon FAQ for Markham, VA

What EPA Radon Zone is Markham in?

Markham and the 22643 zip code are in Fauquier County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Markham?

Radon mitigation in Markham 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 Markham?

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 Virginia

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

City	Avg User Radon Level	Submissions
Fredericksburg	7.29 pCi/L	7
King George	7.17 pCi/L	6
Leesburg	9.80 pCi/L	5
Chantilly	9.60 pCi/L	5
Fancy Gap	9.40 pCi/L	5
Williamsburg	5.80 pCi/L	5
Purcellville	10.75 pCi/L	4
Aldie	8.00 pCi/L	4
Front Royal	7.75 pCi/L	4
Bristol	7.50 pCi/L	4