Rapid City, SD Radon Mitigation and Testing

Q: What is the average radon level in Rapid City, SD?

Based on 2 user-submitted tests, the average radon level is 10.50 pCi/L.

Q: What EPA Radon Zone is Rapid City in?

Rapid City is in Pennington County, EPA Zone 2.

Q: How much does radon mitigation cost in Rapid City?

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

Avg: 10.50 pCi/L

Pennington County

EPA Zone 2

2 user tests

Rapid City in Pennington County shows an average radon level of 10.5 pCi/L, significantly above the EPA action threshold, with readings ranging from 6.0 to 15.0 pCi/L across zip codes 57701-57703. The Black Hills region's granite and uranium-bearing rock formations create consistently elevated radon potential. Professional mitigation is strongly recommended for homes in this high-radon area.

10.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Rapid City, SD. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Rapid City, SD Radon Mitigation

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

Rapid City, SD Radon Testing

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

Rapid City, South Dakota Radon Levels

User-submitted radon test readings from homes in the Rapid City area.

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Rapid City, SD	21-50 Years	No Basement/All Crawl Space	Dec 2019
15 pCi/L	Rapid City, SD	21-50 Years	No Basement/All Slab	Jan 2019

Have a radon test result for Rapid City? Submit your reading to help other homeowners.

Rapid City Radon Facts

Key details about the radon risk profile for Rapid City and the 57701 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Pennington County, SD

Zip Code

57701

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

10.50 pCi/L

User Tests Submitted

Rapid City and the 57701 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 Rapid City, SD

What is the average radon level in Rapid City, SD?

Based on 2 user-submitted tests, the average radon level in Rapid City is 10.50 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Rapid City in?

Rapid City and the 57701 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 Rapid City?

Radon mitigation in Rapid City 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 Rapid City?

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