Waltham, MN Radon Levels

Q: What EPA Radon Zone is Waltham in?

Waltham is in Mower County, EPA Zone 1.

Q: How much does radon mitigation cost in Waltham?

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

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

Waltham, MN Radon Facts

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

County Mower County, MN

Zip Code 55982

Located in southeastern Minnesota's Mower County, Waltham sits on glacial till deposits over limestone bedrock that can contribute to elevated radon levels across the region. This rural community features agricultural properties and scattered residential development in zip code 55982. With testing data currently unavailable and Minnesota's high radon potential, professional testing is strongly recommended for all area homes.

5.50

pCi/L area average

Above EPA Action Level

Mower County average: 5.50 pCi/L, based on 2 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Waltham 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+

Waltham, 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 Waltham, MN

No homeowner tests have been submitted for Waltham 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
Blooming Prairie	11.2 mi	4.00 pCi/L	1
Lyle	19.3 mi	3.00 pCi/L	1
Le Roy	26.4 mi	8.00 pCi/L	1
Albert Lea	27.0 mi	7.00 pCi/L	1
Faribault	39.3 mi	10.00 pCi/L	2
Wells	43.1 mi	6.00 pCi/L	1
Northfield	47.3 mi	4.50 pCi/L	2

Mower County Radon Profile

Because of its underlying geology, Mower County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 2 cities in Mower County average 5.50 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Mower County home regardless of zone or a neighbor's results.

Radon FAQ for Waltham, MN

What EPA Radon Zone is Waltham in?

Waltham and the 55982 zip code are in Mower 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.

Why are radon readings shown from areas near Waltham?

No homeowner radon tests have been submitted for Waltham yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Mower County average—are the best available indicator of local conditions until Waltham 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 Waltham?

Radon mitigation in Waltham 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 Waltham?

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.