Davenport, ND Radon Mitigation and Testing

Q: What EPA Radon Zone is Davenport in?

Davenport is in Cass County, EPA Zone 1.

Q: How much does radon mitigation cost in Davenport?

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

Cass County

EPA Zone 1

Located in Cass County within the Fargo Metro area, Davenport sits on the Red River Valley's glacial lake deposits, which generally result in lower radon potential despite the EPA Zone 1 designation. Testing data for zip code 58021 is currently limited, making individual home assessment important for residents. The area's relatively newer construction and clay-rich soils may help reduce radon entry, though testing remains the only reliable method to determine actual levels.

Davenport, ND Radon Mitigation

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

Davenport, ND Radon Testing

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

Davenport Radon Facts

Key details about the radon risk profile for Davenport and the 58021 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Cass County, ND

Zip Code

58021

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Davenport and the 58021 zip code are located in Cass 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 Davenport, ND

What EPA Radon Zone is Davenport in?

Davenport and the 58021 zip code are in Cass 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 Davenport?

Radon mitigation in Davenport 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 Davenport?

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