Williston, SC Radon Mitigation and Testing

Q: What EPA Radon Zone is Williston in?

Williston is in Barnwell County, EPA Zone 3.

Q: How much does radon mitigation cost in Williston?

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

Barnwell County

EPA Zone 3

Williston, SC resides in Barnwell 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. Testing is recommended for all homes in the 29853 zip code area.

Williston, SC Radon Mitigation

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

Williston, SC Radon Testing

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

Williston Radon Facts

Key details about the radon risk profile for Williston and the 29853 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Barnwell County, SC

Zip Code

29853

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Williston and the 29853 zip code are located in Barnwell 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 Williston, SC

What EPA Radon Zone is Williston in?

Williston and the 29853 zip code are in Barnwell 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 Williston?

Radon mitigation in Williston 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 Williston?

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