Chantilly, VA Radon Mitigation and Testing

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

Based on 5 user-submitted tests, the average radon level is 9.60 pCi/L.

Q: What EPA Radon Zone is Chantilly in?

Chantilly is in Fairfax County, EPA Zone 1.

Q: How much does radon mitigation cost in Chantilly?

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

Avg: 9.60 pCi/L

Fairfax County

EPA Zone 1

5 user tests

Chantilly is located in Fairfax County, Virginia. With 5 user-submitted readings averaging 9.60 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 20151 zip code.

9.60

pCi/L average

Above EPA Action Level

Based on 5 user-submitted radon tests for homes in Chantilly, VA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Chantilly, VA Radon Mitigation

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

Chantilly, VA Radon Testing

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

Chantilly, Virginia Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
2 pCi/L	Chantilly, VA	21-50 Years	Partial Basement	Jul 2024
10 pCi/L	Chantilly, VA	0-20 Years	Full Basement	Nov 2022
4 pCi/L	Chantilly, VA	0-20 Years	Full Basement	Nov 2021
13 pCi/L	Chantilly, VA	0-20 Years	Full Basement	Aug 2019
19 pCi/L	Chantilly, VA	0-20 Years	Full Basement	Oct 2016

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

Chantilly Radon Facts

Key details about the radon risk profile for Chantilly and the 20151 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Fairfax County, VA

Zip Code

20151

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

9.60 pCi/L

User Tests Submitted

Chantilly and the 20151 zip code are located in Fairfax County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Chantilly, VA

What is the average radon level in Chantilly, VA?

Based on 5 user-submitted tests, the average radon level in Chantilly is 9.60 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 Chantilly in?

Chantilly and the 20151 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 Chantilly?

Radon mitigation in Chantilly 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 Chantilly?

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