Call For A Free Quote: 1-800-299-3578 (toll free) | 302-304-3113 (local)

Lewes, DE Radon Levels

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


Lewes, DE Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)
County Sussex County, DE
Zip Code 19958
Avg. User Level 6.00 pCi/L
User Tests 1

Positioned in Sussex County along Delaware's Atlantic coast, Lewes has recorded an average radon level of 6.0 pCi/L, which exceeds the EPA's 4.0 pCi/L action threshold. The coastal location and underlying geology contribute to elevated radon potential in zip code 19958. Residents should prioritize radon testing and mitigation, as even homes near the ocean can experience significant radon accumulation in enclosed spaces.

6.00
pCi/L average
Above EPA Action Level

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

0
4.0 EPA
10+

Lewes, DE Radon Mitigation

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

Need Radon Mitigation or Testing in Lewes?

  • 100% Free, No-Obligation Quotes
  • Matches You with State-Licensed Sussex County Pros
1-800-299-3578 302-304-3113 (local) Toll-free · Mon–Fri 8am–6pm ET

Lewes, DE Radon Levels

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

Radon LevelCityHome AgeFoundation
6 pCi/L Lewes, DE 0-20 Years Full Basement

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

Radon FAQ for Lewes, DE

What is the average radon level in Lewes, DE?
Based on 1 user-submitted test, the average radon level in Lewes 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 Lewes in?
Lewes and the 19958 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 Lewes?
Radon mitigation in Lewes 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 Lewes?
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