Onley, VA Radon Levels

Q: What EPA Radon Zone is Onley in?

Onley is in Accomack County, EPA Zone 3.

Q: How much does radon mitigation cost in Onley?

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

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

Onley, VA Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)

County Accomack County, VA

Zip Code 23418

Situated on Virginia's Eastern Shore in Accomack County, Onley lies within the Atlantic Coastal Plain where sandy soils and marine sediments typically result in lower radon potential compared to inland areas. The community's housing mix includes both traditional Eastern Shore architecture and newer residential construction, many built on slab foundations or with minimal below-grade spaces. Although radon testing data for zip code 23418 remains limited, homeowners should still test their properties since individual readings can vary from regional expectations.

Onley, VA Radon Mitigation

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

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Radon FAQ for Onley, VA

What EPA Radon Zone is Onley in?

Onley and the 23418 zip code are in Accomack County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Onley?

Radon mitigation in Onley 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 Onley?

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