Thompson, ND Radon Mitigation and Testing

Q: What is the average radon level in Thompson, ND?

Based on 1 user-submitted tests, the average radon level is 20.00 pCi/L.

Q: What EPA Radon Zone is Thompson in?

Thompson is in Grand Forks County, EPA Zone 1.

Q: How much does radon mitigation cost in Thompson?

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

Avg: 20.00 pCi/L

Grand Forks County

EPA Zone 1

1 user test

Thompson in Grand Forks County recorded an extremely high radon reading of 20.0 pCi/L, five times above the EPA action level and among the highest levels documented in North Dakota. This rural community sits on glacial lake deposits and till over sedimentary bedrock, creating conditions highly favorable for radon accumulation. Properties in zip code 58278 should undergo immediate radon testing and likely require mitigation systems given the area's demonstrated elevated readings.

20.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Thompson, ND. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Thompson, ND Radon Mitigation

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

Thompson, ND Radon Testing

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

Thompson, North Dakota Radon Levels

User-submitted radon test readings from homes in the Thompson area.

Radon Level	City	Home Age	Foundation	Submitted
20 pCi/L	Thompson, ND	21-50 Years	Full Basement	Aug 2024

Have a radon test result for Thompson? Submit your reading to help other homeowners.

Thompson Radon Facts

Key details about the radon risk profile for Thompson and the 58278 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Grand Forks County, ND

Zip Code

58278

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

20.00 pCi/L

User Tests Submitted

Thompson and the 58278 zip code are located in Grand Forks 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 Thompson, ND

What is the average radon level in Thompson, ND?

Based on 1 user-submitted test, the average radon level in Thompson is 20.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Thompson in?

Thompson and the 58278 zip code are in Grand Forks 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 Thompson?

Radon mitigation in Thompson 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 Thompson?

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