Fairfax, VA Radon Levels

Q: What is the average radon level in Fairfax, VA?

Based on 3 user-submitted tests, the average radon level is 9.70 pCi/L.

Q: What EPA Radon Zone is Fairfax in?

Fairfax is in Fairfax County, EPA Zone 1.

Q: How much does radon mitigation cost in Fairfax?

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

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

Fairfax, VA Radon Facts

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

County Fairfax County, VA

Zip Code 22030

Avg. User Level 9.70 pCi/L

User Tests 3

Located in Fairfax City and County within the Washington D.C. metropolitan area, Fairfax shows concerning radon levels with an average of 9.67 pCi/L - significantly exceeding the EPA action threshold. The area's Piedmont geology, featuring crystalline bedrock and residual soils, creates conditions highly favorable for radon accumulation in the many split-level and basement homes common throughout Northern Virginia. Given these elevated readings across multiple zip codes, all residents should prioritize professional radon testing and mitigation.

9.70

pCi/L average

Above EPA Action Level

Based on 3 user-submitted radon tests for homes in Fairfax, VA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Fairfax, VA Radon Mitigation

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Fairfax, VA Radon Levels

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

Radon Level	City	Home Age	Foundation
15 pCi/L	Fairfax, VA	21-50 Years	Full Basement
6 pCi/L	Fairfax, VA	51-99 Years	Full Basement
8 pCi/L	Fairfax, VA	21-50 Years	Full Basement

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

Radon FAQ for Fairfax, VA

What is the average radon level in Fairfax, VA?

Based on 3 user-submitted tests, the average radon level in Fairfax is 9.70 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 Fairfax in?

Fairfax and the 22030 zip code are in Fairfax 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 Fairfax?

Radon mitigation in Fairfax 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 Fairfax?

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

Fairfax, VA Radon Levels

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

Fairfax, VA Radon Facts

Fairfax, VA Radon Mitigation

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Fairfax, VA Radon Levels

Radon FAQ for Fairfax, VA

Most Active Radon Markets in Virginia

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