Stillwater, MN Radon Levels

Q: What EPA Radon Zone is Stillwater in?

Stillwater is in Washington County, EPA Zone 1.

Q: How much does radon mitigation cost in Stillwater?

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

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

Stillwater, MN Radon Facts

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

County Washington County, MN

Zip Code 55082

Nestled in Washington County along the St. Croix River valley within the Minneapolis-St. Paul Metro, Stillwater sits on glacial deposits that can trap radon gas beneath homes. The historic river town features a mix of 19th-century homes and modern suburban development, many with full basements. Current testing data for the 55082 area is limited, making professional radon testing advisable for all residents.

5.33

pCi/L area average

Above EPA Action Level

Washington County average: 5.33 pCi/L, based on 6 user-submitted tests across 6 cities in the county. No homeowner readings have been submitted for Stillwater 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+

Stillwater, 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 Stillwater, MN

No homeowner tests have been submitted for Stillwater 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
Lake Elmo	5.4 mi	4.00 pCi/L	1
Saint Paul	14.7 mi	8.40 pCi/L	5
Forest Lake	15.6 mi	4.00 pCi/L	1
Cottage Grove	16.6 mi	7.00 pCi/L	2
Minneapolis	23.1 mi	5.00 pCi/L	2
Hastings	24.1 mi	8.50 pCi/L	2
Champlin	27.1 mi	5.00 pCi/L	2
Hopkins	30.4 mi	7.00 pCi/L	1

Washington County Radon Profile

Washington County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 6 cities in Washington County average 5.33 pCi/L across 6 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Washington County to test, as levels can differ between neighboring homes.

Radon FAQ for Stillwater, MN

What EPA Radon Zone is Stillwater in?

Stillwater and the 55082 zip code are in Washington 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 Stillwater?

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

Radon mitigation in Stillwater 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 Stillwater?

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.