Saint Onge, SD Radon Levels

Q: What EPA Radon Zone is Saint Onge in?

Saint Onge is in Lawrence County, EPA Zone 2.

Q: How much does radon mitigation cost in Saint Onge?

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

Check local Saint Onge radon levels and find certified testing and mitigation professionals to keep your home safe

Saint Onge, SD Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Lawrence County, SD

Zip Code 57779

Situated in Lawrence County near the Black Hills, Saint Onge falls within EPA Zone 2, indicating moderate radon potential from the area's diverse geological formations. The 57779 zip code encompasses both sedimentary bedrock areas and granitic outcrops that can produce varying radon levels. With limited local testing data available, homeowners in this mountain-foothill community should test their properties to understand their specific radon exposure risk.

Saint Onge, SD Radon Mitigation

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

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Radon FAQ for Saint Onge, SD

What EPA Radon Zone is Saint Onge in?

Saint Onge and the 57779 zip code are in Lawrence 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 Saint Onge?

Radon mitigation in Saint Onge 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 Saint Onge?

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 Dakota

Cities in South Dakota with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Spearfish	7.75 pCi/L	4
Rapid City	10.50 pCi/L	2
Aberdeen	8.50 pCi/L	2
Sioux Falls	6.00 pCi/L	2
Watertown	6.00 pCi/L	2