Grand Portage, MN Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 16.00 pCi/L.

Q: What EPA Radon Zone is Grand Portage in?

Grand Portage is in Cook County, EPA Zone 2.

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

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

Avg: 16.00 pCi/L

Cook County

EPA Zone 2

1 user test

Located at Minnesota's northeastern tip in Cook County, Grand Portage has recorded an exceptionally high radon reading of 16.0 pCi/L. This level significantly exceeds EPA action guidelines, likely reflecting the area's complex geology where ancient Precambrian rocks meet Lake Superior's shoreline. Given this elevated reading in zip code 55605, local residents should prioritize radon testing and mitigation measures.

16.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Grand Portage, MN Radon Mitigation

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

Grand Portage, MN Radon Testing

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

Grand Portage, Minnesota Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
16 pCi/L	Grand Portage, MN	0-20 Years	Full Basement	Aug 2021

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

Grand Portage Radon Facts

Key details about the radon risk profile for Grand Portage and the 55605 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Cook County, MN

Zip Code

55605

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

16.00 pCi/L

User Tests Submitted

Grand Portage and the 55605 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 Portage, MN

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

Based on 1 user-submitted test, the average radon level in Grand Portage is 16.00 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 Portage in?

Grand Portage and the 55605 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 Portage?

Radon mitigation in Grand Portage 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 Portage?

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