Fargo, ND Radon Mitigation and Testing

Q: What EPA Radon Zone is Fargo in?

Fargo is in Cass County, EPA Zone 1.

Q: How much does radon mitigation cost in Fargo?

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

As North Dakota's largest city in Cass County, Fargo sits along the Red River valley where clay-rich glacial lake deposits can influence radon migration patterns throughout the metro area. The city's diverse housing stock spans from historic downtown properties to modern suburban developments, with most homes featuring full basements due to the region's harsh winters and deep frost line requirements. Despite limited current testing data for ZIP 58102, residents should consider radon testing given the EPA Zone 1 designation and the prevalence of basement construction in the Fargo Metro.

Fargo, ND Radon Mitigation

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

Fargo, ND Radon Testing

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

Fargo Radon Facts

Key details about the radon risk profile for Fargo and the 58102 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Cass County, ND

Zip Code

58102

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Fargo and the 58102 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 Fargo, ND

What EPA Radon Zone is Fargo in?

Fargo and the 58102 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 Fargo?

Radon mitigation in Fargo 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 Fargo?

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