Greenville, OH Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 8.00 pCi/L.

Q: What EPA Radon Zone is Greenville in?

Greenville is in Darke County, EPA Zone 1.

Q: How much does radon mitigation cost in Greenville?

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

Avg: 8.00 pCi/L

Darke County

EPA Zone 1

1 user test

Located in west-central Ohio's Darke County, Greenville sits atop glacial till over limestone bedrock that contributes to elevated radon potential. Recent testing in zip code 45331 shows an average radon level of 8.0 pCi/L, which exceeds the EPA action level of 4.0 pCi/L. Homeowners should prioritize radon testing and mitigation, especially in the area's many older homes with full basements typical of Ohio construction.

8.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Greenville, OH Radon Mitigation

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

Greenville, OH Radon Testing

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

Greenville, Ohio Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
8 pCi/L	Greenville, OH	21-50 Years	No Basement/All Slab	Dec 2024

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

Greenville Radon Facts

Key details about the radon risk profile for Greenville and the 45331 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Darke County, OH

Zip Code

45331

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

8.00 pCi/L

User Tests Submitted

Greenville and the 45331 zip code are located in Darke County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Greenville, OH

What is the average radon level in Greenville, OH?

Based on 1 user-submitted test, the average radon level in Greenville is 8.00 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 Greenville in?

Greenville and the 45331 zip code are in Darke County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Greenville?

Radon mitigation in Greenville 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 Greenville?

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