New Castle, DE Radon Levels

Q: What is the average radon level in New Castle, DE?

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is New Castle in?

New Castle is in New Castle County, EPA Zone 2.

Q: How much does radon mitigation cost in New Castle?

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

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

New Castle, DE Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County New Castle County, DE

Zip Code 19720

Avg. User Level 4.00 pCi/L

User Tests 1

Positioned in New Castle County within the Philadelphia Metro region, New Castle shows radon levels of 4.0 pCi/L, matching EPA action guidelines. The community's Piedmont geology and mix of historic and modern housing stock in ZIP code 19720 can influence indoor radon concentrations. Delaware residents should maintain regular testing schedules, as levels at the EPA threshold warrant continued monitoring and potential mitigation.

4.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

New Castle, DE Radon Mitigation

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New Castle, DE Radon Levels

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

Radon Level	City	Home Age	Foundation
4 pCi/L	New Castle, DE	0-20 Years	Full Basement

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Radon FAQ for New Castle, DE

What is the average radon level in New Castle, DE?

Based on 1 user-submitted test, the average radon level in New Castle is 4.00 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 New Castle in?

New Castle and the 19720 zip code are in New Castle County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in New Castle?

Radon mitigation in New Castle 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 New Castle?

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

New Castle, DE Radon Levels

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

New Castle, DE Radon Facts

New Castle, DE Radon Mitigation

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New Castle, DE Radon Levels

Radon FAQ for New Castle, DE

Most Active Radon Markets in Delaware

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