Delmar, DE Radon Levels
Check local Delmar radon levels and find certified testing and mitigation professionals to keep your home safe
Delmar, DE Radon Facts
EPA Radon Zone
Zone 3 — Low Risk
< 2.0 pCi/L (Zone 3)
County
Sussex County, DE
Zip Code
19940
Straddling the Delaware-Maryland border in Sussex County, Delmar sits on the Delmarva Peninsula where coastal plain sediments typically produce lower radon concentrations. The community's location in EPA Zone 3 and predominant slab-on-grade construction create conditions less favorable for radon accumulation than inland areas. However, testing data for zip code 19940 remains sparse, making baseline radon testing advisable for homeowners to understand their property-specific risk levels.
Delmar, 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 Delmar, DE
What EPA Radon Zone is Delmar in?
Delmar and the 19940 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 Delmar?
Radon mitigation in Delmar 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 Delmar?
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 |