Grand Marais, MN Radon Mitigation and Testing

Q: What is the average radon level in Grand Marais, MN?

Based on 1 user-submitted tests, the average radon level is 8.00 pCi/L.

Q: What EPA Radon Zone is Grand Marais in?

Grand Marais is in Cook County, EPA Zone 2.

Q: How much does radon mitigation cost in Grand Marais?

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

Avg: 8.00 pCi/L

Cook County

EPA Zone 2

1 user test

Perched along Lake Superior's North Shore in Cook County, Grand Marais has recorded a radon level of 8.0 pCi/L in recent testing. This reading doubles the EPA action level, reflecting the area's unique geological setting where Precambrian bedrock and glacial deposits can concentrate radon gas. Homeowners in this remote Minnesota community should test their properties, particularly those with basements or lower-level living spaces.

8.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Grand Marais, MN Radon Mitigation

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

Grand Marais, MN Radon Testing

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

Grand Marais, Minnesota Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
8 pCi/L	Grand Marais, MN	51-99 Years	No Basement/All Crawl Space	May 2024

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

Grand Marais Radon Facts

Key details about the radon risk profile for Grand Marais and the 55604 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Cook County, MN

Zip Code

55604

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

8.00 pCi/L

User Tests Submitted

Grand Marais and the 55604 zip code are located in Cook County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Grand Marais, MN

What is the average radon level in Grand Marais, MN?

Based on 1 user-submitted test, the average radon level in Grand Marais is 8.00 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 Grand Marais in?

Grand Marais and the 55604 zip code are in Cook County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Grand Marais?

Radon mitigation in Grand Marais 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 Grand Marais?

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 Minnesota

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Savage	5.00 pCi/L	3
Faribault	10.00 pCi/L	2
Shakopee	6.50 pCi/L	2
Minneapolis	5.00 pCi/L	2
Lakeville	6.00 pCi/L	1
Delano	5.00 pCi/L	1
Montgomery	5.00 pCi/L	1
Rosemount	No submissions	0