Dover, DE Radon Levels

Q: What EPA Radon Zone is Dover in?

Dover is in Kent County, EPA Zone 3.

Q: How much does radon mitigation cost in Dover?

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

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

Dover, DE Radon Facts

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

County Kent County, DE

Zip Code 19901

As Delaware's capital city in Kent County, Dover encompasses multiple zip codes including 19901 and serves as the center of the Dover Metro area. The city's Atlantic Coastal Plain geology, featuring sand and clay deposits over deeper limestone formations, creates generally lower radon potential compared to other regions. However, testing data remains limited, and homeowners should still conduct radon assessments since individual properties can experience varying levels based on specific geological and construction factors.

Dover, DE 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 Dover, DE

What EPA Radon Zone is Dover in?

Dover and the 19901 zip code are in Kent 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 Dover?

Radon mitigation in Dover 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 Dover?

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.

City	Avg User Radon Level	Submissions
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