Portland, ND Radon Mitigation and Testing

Q: What EPA Radon Zone is Portland in?

Portland is in Traill County, EPA Zone 1.

Q: How much does radon mitigation cost in Portland?

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

Traill County

EPA Zone 1

Positioned in Traill County along North Dakota's eastern border, Portland occupies glacial lake plain deposits that typically show lower radon potential. However, with limited testing data available for zip code 58274, individual home assessment remains important. The community's agricultural setting and varied foundation types mean that radon levels can still vary significantly between properties.

Portland, ND Radon Mitigation

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

Portland, ND Radon Testing

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

Portland Radon Facts

Key details about the radon risk profile for Portland and the 58274 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Traill County, ND

Zip Code

58274

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Portland and the 58274 zip code are located in Traill 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 Portland, ND

What EPA Radon Zone is Portland in?

Portland and the 58274 zip code are in Traill 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 Portland?

Radon mitigation in Portland 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 Portland?

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