Johnsonville, SC Radon Mitigation and Testing

Q: What EPA Radon Zone is Johnsonville in?

Johnsonville is in Florence County, EPA Zone 3.

Q: How much does radon mitigation cost in Johnsonville?

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

Florence County

EPA Zone 3

Situated in Florence County within the Florence Metro area, Johnsonville sits on Coastal Plain sediments where radon levels are typically lower but can vary by specific location. Limited testing data for the 29555 zip code makes individual home testing advisable for residents seeking to understand their exposure risk.

Johnsonville, SC Radon Mitigation

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

Johnsonville, SC Radon Testing

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

Johnsonville Radon Facts

Key details about the radon risk profile for Johnsonville and the 29555 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Florence County, SC

Zip Code

29555

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Johnsonville and the 29555 zip code are located in Florence 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 Johnsonville, SC

What EPA Radon Zone is Johnsonville in?

Johnsonville and the 29555 zip code are in Florence 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 Johnsonville?

Radon mitigation in Johnsonville 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 Johnsonville?

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