Keystone, SD Radon Mitigation and Testing

Q: What EPA Radon Zone is Keystone in?

Keystone is in Pennington County, EPA Zone 2.

Q: How much does radon mitigation cost in Keystone?

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

Pennington County

EPA Zone 2

Gateway to Mount Rushmore in Pennington County, Keystone sits within the Black Hills region where granite and metamorphic rocks can produce variable radon levels. The tourist town features a mix of seasonal businesses and residential properties adapted to the mountainous terrain. With no current testing data available for zip code 57751, both residents and business owners should consider radon testing given the area's complex geology.

Keystone, SD Radon Mitigation

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

Keystone, SD Radon Testing

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

Keystone Radon Facts

Key details about the radon risk profile for Keystone and the 57751 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Pennington County, SD

Zip Code

57751

Predicted Screening Level

2–4 pCi/L (Zone 2)

Keystone and the 57751 zip code are located in Pennington County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Keystone, SD

What EPA Radon Zone is Keystone in?

Keystone and the 57751 zip code are in Pennington 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 Keystone?

Radon mitigation in Keystone 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 Keystone?

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 with the most user-submitted radon test data in the state.

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