Saint Thomas, ND Radon Levels

Q: What EPA Radon Zone is Saint Thomas in?

Saint Thomas is in Pembina County, EPA Zone 1.

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

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

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

Saint Thomas, ND Radon Facts

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

County Pembina County, ND

Zip Code 58276

Saint Thomas in Pembina County sits in northeastern North Dakota near the Minnesota border, where glacial lake deposits and clay-rich soils over shale bedrock create variable radon conditions across the Red River Valley region. The small farming community features primarily older homes and farmsteads with basements and crawl spaces common in local construction. Current radon testing data remains sparse, highlighting the need for individual home assessment to establish specific radon exposure levels.

Saint Thomas, 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 Thomas, ND

What EPA Radon Zone is Saint Thomas in?

Saint Thomas and the 58276 zip code are in Pembina 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 Thomas?

Radon mitigation in Saint Thomas 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 Thomas?

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