Middletown, DE Radon Mitigation and Testing

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

Based on 7 user-submitted tests, the average radon level is 7.40 pCi/L.

Q: What EPA Radon Zone is Middletown in?

Middletown is in New Castle County, EPA Zone 2.

Q: How much does radon mitigation cost in Middletown?

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

Avg: 7.40 pCi/L

New Castle County

EPA Zone 2

7 user tests

This Philadelphia Metro community in New Castle County shows concerning radon levels, with an average of 7.43 pCi/L based on seven tests, well above the EPA's 4.0 pCi/L action threshold. Located in EPA Zone 2, the area's Piedmont geology and growing suburban development create conditions where radon can accumulate. Residents in zip code 19709 should prioritize radon testing and consider mitigation given these elevated readings.

7.40

pCi/L average

Above EPA Action Level

Based on 7 user-submitted radon tests for homes in Middletown, DE. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Middletown, DE Radon Mitigation

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

Middletown, DE Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Middletown, Delaware Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
7 pCi/L	Middletown, DE	0-20 Years	Full Basement	Aug 2025
6 pCi/L	Middletown, DE	0-20 Years	Full Basement	May 2021
9 pCi/L	Middletown, DE	0-20 Years	Partial Basement	Jun 2020
5 pCi/L	Middletown, DE	0-20 Years	Full Basement	Apr 2018
13 pCi/L	Middletown, DE	0-20 Years	Full Basement	Dec 2017

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

Middletown Radon Facts

Key details about the radon risk profile for Middletown and the 19709 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

New Castle County, DE

Zip Code

19709

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

7.40 pCi/L

User Tests Submitted

Middletown and the 19709 zip code are located in New Castle County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Middletown, DE

What is the average radon level in Middletown, DE?

Based on 7 user-submitted tests, the average radon level in Middletown is 7.40 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 Middletown in?

Middletown and the 19709 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 Middletown?

Radon mitigation in Middletown 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 Middletown?

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 with the most user-submitted radon test data in the state.

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