Hermosa, SD Radon Mitigation and Testing

Q: What EPA Radon Zone is Hermosa in?

Hermosa is in Custer County, EPA Zone 2.

Q: How much does radon mitigation cost in Hermosa?

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

Custer County

EPA Zone 2

Situated in Custer County within the Rapid City Metro area, Hermosa lies where Black Hills geology meets prairie formations that can influence radon levels. Although testing data for this 57744 community is currently limited, the underlying bedrock composition suggests homeowners should prioritize radon testing. EPA Zone 2 classification indicates moderate radon potential throughout the region.

Hermosa, SD Radon Mitigation

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

Hermosa, SD Radon Testing

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

Hermosa Radon Facts

Key details about the radon risk profile for Hermosa and the 57744 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Custer County, SD

Zip Code

57744

Predicted Screening Level

2–4 pCi/L (Zone 2)

Hermosa and the 57744 zip code are located in Custer 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 Hermosa, SD

What EPA Radon Zone is Hermosa in?

Hermosa and the 57744 zip code are in Custer 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 Hermosa?

Radon mitigation in Hermosa 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 Hermosa?

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