Round O, SC Radon Mitigation and Testing

Q: What EPA Radon Zone is Round O in?

Round O is in Colleton County, EPA Zone 3.

Q: How much does radon mitigation cost in Round O?

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

Colleton County

EPA Zone 3

Located in rural Colleton County on South Carolina's coastal plain, Round O sits over sandy soils and marine sediments that typically produce minimal radon. Testing data for the 29474 zip code remains unavailable, though the area's geology generally favors low radon conditions. Residents should still conduct testing to establish baseline readings despite the favorable geological setting.

Round O, SC Radon Mitigation

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

Round O, SC Radon Testing

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

Round O Radon Facts

Key details about the radon risk profile for Round O and the 29474 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Colleton County, SC

Zip Code

29474

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Round O and the 29474 zip code are located in Colleton 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 Round O, SC

What EPA Radon Zone is Round O in?

Round O and the 29474 zip code are in Colleton 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 Round O?

Radon mitigation in Round O 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 Round O?

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