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Round Hill, VA Radon Levels

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


Round Hill, VA Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
County Loudoun County, VA
Zip Code 20141
Avg. User Level 14.00 pCi/L
User Tests 1

Located in Loudoun County within the Washington Metro area, Round Hill records elevated radon levels averaging 14.0 pCi/L, well above EPA action guidelines. This Virginia Piedmont community sits over granite and schist bedrock that contributes to significant radon production. Homeowners in the 20141 zip code should pursue professional radon mitigation to address these concerning exposure levels.

14.00
pCi/L average
Above EPA Action Level

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

0
4.0 EPA
10+

Round Hill, VA Radon Mitigation

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

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Round Hill, VA Radon Levels

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

Radon LevelCityHome AgeFoundation
14 pCi/L Round Hill, VA 21-50 Years Full Basement

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

Radon FAQ for Round Hill, VA

What is the average radon level in Round Hill, VA?
Based on 1 user-submitted test, the average radon level in Round Hill is 14.00 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 Round Hill in?
Round Hill and the 20141 zip code are in Loudoun 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 Round Hill?
Radon mitigation in Round Hill 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 Round Hill?
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