Call For A Free Quote: 1-800-299-3578 (toll free)

Greenfield, OH Radon Levels

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


Greenfield, OH Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
County Highland County, OH
Zip Code 45123
Avg. User Level 4.00 pCi/L
User Tests 1

Located in Highland County at zip code 45123, Greenfield has recorded an average radon level of 4.0 pCi/L, right at the EPA's action threshold. While this reading is technically within acceptable limits, it represents a borderline condition where continued monitoring is advisable. The area's glacial deposits over shale bedrock can create variable radon conditions between neighboring properties.

4.00
pCi/L average
Above EPA Action Level

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

0
4.0 EPA
10+

Greenfield, OH Radon Mitigation

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

Need Radon Mitigation or Testing in Greenfield?

  • 100% Free, No-Obligation Quotes
  • Matches You with State-Licensed Highland County Pros
1-800-299-3578 Toll-free · Mon–Fri 8am–6pm ET

Greenfield, OH Radon Levels

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

Radon LevelCityHome AgeFoundation
4 pCi/L Greenfield, OH 100+ Years Full Basement

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

Radon FAQ for Greenfield, OH

What is the average radon level in Greenfield, OH?
Based on 1 user-submitted test, the average radon level in Greenfield 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 Greenfield in?
Greenfield and the 45123 zip code are in Highland 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 Greenfield?
Radon mitigation in Greenfield 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 Greenfield?
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 in Ohio with the most user-submitted radon test data, ranked by number of submissions.

CityAvg User Radon LevelSubmissions
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