Hillsboro, OH Radon Mitigation and Testing

Q: What EPA Radon Zone is Hillsboro in?

Hillsboro is in Highland County, EPA Zone 2.

Q: How much does radon mitigation cost in Hillsboro?

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

Highland County

EPA Zone 2

Positioned in Highland County within the Cincinnati Metro area, Hillsboro sits over Ordovician shale and limestone bedrock that contributes to Ohio's generally elevated radon potential. The community's housing stock in zip code 45133 spans historic homes from the 1800s to newer suburban development, many featuring full basements typical of southern Ohio construction. Limited testing data makes baseline radon measurement particularly important for area residents.

Hillsboro, OH Radon Mitigation

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

Hillsboro, OH Radon Testing

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

Hillsboro Radon Facts

Key details about the radon risk profile for Hillsboro and the 45133 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Highland County, OH

Zip Code

45133

Predicted Screening Level

2–4 pCi/L (Zone 2)

Hillsboro and the 45133 zip code are located in Highland 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 Hillsboro, OH

What EPA Radon Zone is Hillsboro in?

Hillsboro and the 45133 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 Hillsboro?

Radon mitigation in Hillsboro 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 Hillsboro?

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