Clio, SC Radon Mitigation and Testing

Q: What EPA Radon Zone is Clio in?

Clio is in Marlboro County, EPA Zone 3.

Q: How much does radon mitigation cost in Clio?

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

Marlboro County

EPA Zone 3

Rural Clio in Marlboro County (29525) occupies South Carolina's Coastal Plain region, where radon levels are typically lower than in the state's mountainous areas. Current radon testing data is limited for this community, though the area's sandy soils and sedimentary geology generally present moderate radon risk. Homeowners should still conduct testing to establish their property's specific radon profile.

Clio, SC Radon Mitigation

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

Clio, SC Radon Testing

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

Clio Radon Facts

Key details about the radon risk profile for Clio and the 29525 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Marlboro County, SC

Zip Code

29525

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Clio and the 29525 zip code are located in Marlboro County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Clio, SC

What EPA Radon Zone is Clio in?

Clio and the 29525 zip code are in Marlboro County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Clio?

Radon mitigation in Clio 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 Clio?

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 South Carolina

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

City	Avg User Radon Level	Submissions
Fort Mill	6.00 pCi/L	1
Greenville	5.00 pCi/L	1