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Millsboro, DE Radon Levels

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


Millsboro, DE Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)
County Sussex County, DE
Zip Code 19966
Avg. User Level 5.00 pCi/L
User Tests 1

Southern Delaware's Sussex County encompasses Millsboro, where recent testing shows radon levels averaging 5.0 pCi/L, exceeding the EPA action threshold of 4.0 pCi/L. Located within the coastal plain region where sedimentary deposits typically produce lower radon levels, this elevated reading highlights the importance of individual testing. Homeowners in zip code 19966 should prioritize radon testing and consider mitigation given this documented elevated reading.

5.00
pCi/L average
Above EPA Action Level

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

0
4.0 EPA
10+

Millsboro, DE Radon Mitigation

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

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Millsboro, DE Radon Levels

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

Radon LevelCityHome AgeFoundation
5 pCi/L Millsboro, DE 0-20 Years Full Basement

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

Radon FAQ for Millsboro, DE

What is the average radon level in Millsboro, DE?
Based on 1 user-submitted test, the average radon level in Millsboro is 5.00 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 Millsboro in?
Millsboro and the 19966 zip code are in Sussex 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 Millsboro?
Radon mitigation in Millsboro 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 Millsboro?
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 Delaware

Cities in Delaware with the most user-submitted radon test data, ranked by number of submissions.

CityAvg User Radon LevelSubmissions
Middletown 7.43 pCi/L 7
Wilmington 5.50 pCi/L 4
Lewes 6.00 pCi/L 1
New Castle 4.00 pCi/L 1
Newark No submissions 0