Madison, SD Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Madison in?

Madison is in Lake County, EPA Zone 1.

Q: How much does radon mitigation cost in Madison?

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

Avg: 6.00 pCi/L

Lake County

EPA Zone 1

1 user test

Located in Lake County within the Sioux Falls Metro area, Madison sits on glacial prairie deposits that can produce elevated radon levels in homes throughout this region of eastern South Dakota. Testing data reveals an average radon level of 6.0 pCi/L, which exceeds the EPA action level and indicates the importance of radon mitigation systems. Residents in zip code 57042 should prioritize professional radon testing and remediation, particularly in homes with basements typical of prairie construction.

6.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Madison, SD. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Madison, SD Radon Mitigation

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

Madison, SD Radon Testing

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

Madison, South Dakota Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Madison, SD	21-50 Years	Full Basement	May 2018

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

Madison Radon Facts

Key details about the radon risk profile for Madison and the 57042 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Lake County, SD

Zip Code

57042

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Madison and the 57042 zip code are located in Lake County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Madison, SD

What is the average radon level in Madison, SD?

Based on 1 user-submitted test, the average radon level in Madison is 6.00 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 Madison in?

Madison and the 57042 zip code are in Lake 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 Madison?

Radon mitigation in Madison 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 Madison?

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