Defiance, OH Radon Mitigation and Testing

Q: What is the average radon level in Defiance, OH?

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

Q: What EPA Radon Zone is Defiance in?

Defiance is in Defiance County, EPA Zone 2.

Q: How much does radon mitigation cost in Defiance?

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

Avg: 4.00 pCi/L

Defiance County

EPA Zone 2

1 user test

Defiance serves as the county seat of Defiance County in northwestern Ohio, where recent testing shows an average radon level of 4.0 pCi/L. This reading sits right at the EPA action threshold, indicating that many homes may require mitigation systems. The area's glacial till soils and traditional basement construction in zip code 43512 create conditions where radon can accumulate.

4.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Defiance, OH Radon Mitigation

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

Defiance, OH Radon Testing

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

Defiance, Ohio Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Defiance, OH	21-50 Years	No Basement/All Crawl Space	Jun 2020

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

Defiance Radon Facts

Key details about the radon risk profile for Defiance and the 43512 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Defiance County, OH

Zip Code

43512

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

4.00 pCi/L

User Tests Submitted

Defiance and the 43512 zip code are located in Defiance 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 Defiance, OH

What is the average radon level in Defiance, OH?

Based on 1 user-submitted test, the average radon level in Defiance 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 Defiance in?

Defiance and the 43512 zip code are in Defiance 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 Defiance?

Radon mitigation in Defiance 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 Defiance?

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 Ohio

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

City	Avg User Radon Level	Submissions
Marietta	8.00 pCi/L	5
Cincinnati	5.20 pCi/L	5
Hilliard	11.75 pCi/L	4
Wilmington	5.25 pCi/L	4
Newark	15.00 pCi/L	3
Athens	11.33 pCi/L	3
Findlay	10.33 pCi/L	3
Perrysburg	9.67 pCi/L	3
Powell	8.33 pCi/L	3
Columbus	6.00 pCi/L	3
Chagrin Falls	4.67 pCi/L	3
Hamilton	10.00 pCi/L	2
Chardon	5.50 pCi/L	2
Strongsville	4.50 pCi/L	2
Maineville	10.00 pCi/L	1
Lancaster	9.00 pCi/L	1
West Chester	9.00 pCi/L	1
Amherst	6.00 pCi/L	1
Chillicothe	6.00 pCi/L	1
Lima	5.00 pCi/L	1