Saint John, ND Radon Levels

Q: What EPA Radon Zone is Saint John in?

Saint John is in Rolette County, EPA Zone 1.

Q: How much does radon mitigation cost in Saint John?

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

Check local Saint John radon levels and find certified testing and mitigation professionals to keep your home safe

Saint John, ND Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Rolette County, ND

Zip Code 58369

Located in northern North Dakota's Rolette County, Saint John falls within EPA Zone 1 where high radon potential is expected across the 58369 zip code. Testing data for this rural community near the Canadian border remains limited for analysis. North Dakota's glacial till deposits and underlying shale formations create favorable conditions for radon gas production, making professional testing particularly important during the region's long heating seasons when homes are sealed tight.

Saint John, ND Radon Mitigation

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

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Radon FAQ for Saint John, ND

What EPA Radon Zone is Saint John in?

Saint John and the 58369 zip code are in Rolette 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 Saint John?

Radon mitigation in Saint John 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 Saint John?

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 in North Dakota with the most user-submitted radon test data, ranked by number of submissions.

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