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Annandale, VA Radon Levels

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


Annandale, VA Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
County Fairfax County, VA
Zip Code 22003
Avg. User Level 20.00 pCi/L
User Tests 1

This established community in Fairfax County within the Washington Metro has shown notably elevated radon levels, with current testing revealing an average of 20.0 pCi/L - significantly exceeding the EPA action level. Annandale's mature housing stock, predominantly built between the 1950s and 1980s with full basements, sits atop Northern Virginia's complex geology of clay soils over granite bedrock. Properties in the 22003 area should prioritize radon testing and likely require professional mitigation systems.

20.00
pCi/L average
Above EPA Action Level

Based on 1 user-submitted radon test for homes in Annandale, VA. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

Annandale, VA Radon Mitigation

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

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Annandale, VA Radon Levels

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

Radon LevelCityHome AgeFoundation
20 pCi/L Annandale, VA 51-99 Years Partial Basement

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

Radon FAQ for Annandale, VA

What is the average radon level in Annandale, VA?
Based on 1 user-submitted test, the average radon level in Annandale is 20.00 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 Annandale in?
Annandale and the 22003 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 Annandale?
Radon mitigation in Annandale 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 Annandale?
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.

CityAvg User Radon LevelSubmissions
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