Onamia, MN Radon Levels

Q: What EPA Radon Zone is Onamia in?

Onamia is in Mille Lacs County, EPA Zone 2.

Q: Why are radon readings shown from areas near Onamia?

No homeowner radon tests have been submitted for Onamia yet, so readings from the closest cities and the Mille Lacs County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Onamia?

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

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

Onamia, MN Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Mille Lacs County, MN

Zip Code 56359

Located in Mille Lacs County within the Minneapolis-St. Paul metro area, Onamia sits in zip code 56359 where glacial deposits and underlying bedrock create moderate radon potential reflected in the EPA Zone 2 classification. The community's position in central Minnesota's lake country places it within geological conditions typical of the broader metro region. Testing data for this area remains limited, making individual home testing important for residents seeking to understand their radon exposure levels.

12.00

pCi/L area average

Above EPA Action Level

Mille Lacs County average: 12.00 pCi/L, based on 2 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Onamia itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Onamia, MN Radon Mitigation

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

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Radon Readings Near Onamia, MN

No homeowner tests have been submitted for Onamia yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Isle	11.6 mi	20.00 pCi/L	1
Milaca	21.6 mi	4.00 pCi/L	1
Mora	23.1 mi	6.00 pCi/L	2
Deerwood	26.3 mi	16.00 pCi/L	1
Aitkin	27.0 mi	8.00 pCi/L	1
Nisswa	40.3 mi	4.00 pCi/L	1
Motley	44.1 mi	7.00 pCi/L	1
Rush City	44.6 mi	5.00 pCi/L	1

Mille Lacs County Radon Profile

Mille Lacs County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 2 cities in Mille Lacs County average 12.00 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Mille Lacs County.

Radon FAQ for Onamia, MN

What EPA Radon Zone is Onamia in?

Onamia and the 56359 zip code are in Mille Lacs 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.

Why are radon readings shown from areas near Onamia?

No homeowner radon tests have been submitted for Onamia yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Mille Lacs County average—are the best available indicator of local conditions until Onamia homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Onamia?

Radon mitigation in Onamia 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 Onamia?

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.