Marion, ND Radon Mitigation and Testing

Q: What EPA Radon Zone is Marion in?

Marion is in Lamoure County, EPA Zone 1.

Q: How much does radon mitigation cost in Marion?

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

Lamoure County

EPA Zone 1

Located in Lamoure County on North Dakota's glacial prairie, Marion sits within an agricultural region where thick glacial till deposits can influence radon migration patterns. Testing data remains limited for this rural community, making professional home testing particularly valuable for local residents. The state's variable radon potential across different geological zones emphasizes the importance of individual property assessment.

Marion, ND Radon Mitigation

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

Marion, ND Radon Testing

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

Marion Radon Facts

Key details about the radon risk profile for Marion and the 58466 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Lamoure County, ND

Zip Code

58466

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Marion and the 58466 zip code are located in Lamoure 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 Marion, ND

What EPA Radon Zone is Marion in?

Marion and the 58466 zip code are in Lamoure 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 Marion?

Radon mitigation in Marion 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 Marion?

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 North Dakota

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

City	Avg User Radon Level	Submissions
Grand Forks	13.50 pCi/L	8
Grafton	7.67 pCi/L	3
Dickinson	6.00 pCi/L	3
Watford City	5.50 pCi/L	2
Bismarck	No submissions	0