Marshall, VA Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Marshall in?

Marshall is in Fauquier County, EPA Zone 2.

Q: How much does radon mitigation cost in Marshall?

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

Avg: 6.00 pCi/L

Fauquier County

EPA Zone 2

1 user test

Located in Fauquier County within the Washington Metro area, Marshall shows an average radon level of 6.0 pCi/L, which exceeds the EPA's 4.0 pCi/L action level. The area's Piedmont geology, featuring crystalline bedrock and residual soils, contributes to elevated radon potential across zip code 20115. Homeowners should prioritize radon testing and mitigation, particularly in homes with basements or crawl spaces common to this region.

6.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Marshall, VA Radon Mitigation

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

Marshall, VA Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Marshall, Virginia Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Marshall, VA	21-50 Years	Full Basement	Mar 2021

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

Marshall Radon Facts

Key details about the radon risk profile for Marshall and the 20115 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Fauquier County, VA

Zip Code

20115

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Marshall and the 20115 zip code are located in Fauquier County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Marshall, VA

What is the average radon level in Marshall, VA?

Based on 1 user-submitted test, the average radon level in Marshall is 6.00 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 Marshall in?

Marshall and the 20115 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 Marshall?

Radon mitigation in Marshall 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 Marshall?

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 with the most user-submitted radon test data in the state.

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
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
Winchester	7.00 pCi/L	4
Williamsburg	5.75 pCi/L	4
Lovettsville	5.25 pCi/L	4
Woodbridge	4.50 pCi/L	4
Fairfax	9.67 pCi/L	3
Stafford	9.33 pCi/L	3
Louisa	8.33 pCi/L	3
Linden	7.67 pCi/L	3
Warrenton	7.67 pCi/L	3
Burke	5.67 pCi/L	3
Lynchburg	5.33 pCi/L	3