Roslyn, SD Radon Levels

Q: What EPA Radon Zone is Roslyn in?

Roslyn is in Day County, EPA Zone 1.

Q: How much does radon mitigation cost in Roslyn?

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

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

Roslyn, SD Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Day County, SD

Zip Code 57261

Roslyn in Day County sits within EPA Zone 1, indicating high radon potential across this northeastern South Dakota area. Testing data for zip code 57261 remains limited, though the region's glacial geology often creates conditions favorable for radon accumulation. Local homeowners should prioritize professional radon assessment given the elevated risk classification and prevalence of basement foundations in the area.

Roslyn, 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 Roslyn, SD

What EPA Radon Zone is Roslyn in?

Roslyn and the 57261 zip code are in Day County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Roslyn?

Radon mitigation in Roslyn 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 Roslyn?

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