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Radon Testing · Clear Lake, IA

Radon Testing in Clear Lake

Radon Testing in Clear Lake, IA: The city is named for the large natural lake it sits on, and its downtown includes rowhouses. Report within 24 hours.

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Clear Lake · Cerro Gordo County

Radon Testing in Clear Lake

Radon Testing in Clear Lake, Cerro Gordo County, by Closer Look Inspectors. Clear Lake is a lake resort city of cottages, year-round conversions and newer lakeshore builds.

Radon testing places an EPA-protocol continuous monitor on a home's lowest livable level to measure radon gas — and it matters across Iowa, where Iowa HHS reports 71.6 percent of homes above the action level — the largest percentage of any state.

Clear Lake is served by our Mason City team →  ·  (563) 517-7815

Modern white farmhouse-style home with black windows and dark garage doors — Radon Testing in Clear Lake, IAClear Lake
Local housing

Homes in Clear Lake.

Clear Lake housing runs to lake cottages, year-round conversions and newer lakeshore builds, across the lakeshore and the newer development inland, on lake-adjacent till with a high seasonal water table — and that mix shapes what a radon testing here needs to find.

Local conditions in Clear Lake

Clear Lake sits in Cerro Gordo County, and every Iowa county is in EPA Radon Zone 1, so radon testing belongs in your purchase plan. The city is named for the large natural lake it sits on, and its downtown includes rowhouses. Any home with a basement, crawlspace or finished lower level is a place where radon can enter. We set the test in the lowest area you would use, keep closed-house conditions, and explain the numbers and when mitigation is worth discussing.

Local facts checked October 2026 against: Wikipedia.

Radon Testing in Clear Lake: what matters

Glacial gravel soil in a dug hole, autumn: radon testing in Clear Lake, IA
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Poured foundation wall exterior, summer: radon testing in Clear Lake, IA
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Home inspection in Clear Lake →  ·  More about radon testing →

Questions

Common questions.

Is radon really a concern in Iowa?
Yes. The Iowa Department of Natural Resources reports that more than two in five Iowa homes have radon levels that pose a significant health risk, and finished basements are where it concentrates.
How long does the test run?
A 48-hour minimum under closed-house conditions; the result is delivered with your inspection report.
Are Clear Lake's converted cottages a special case?
They are. Seasonal cottages converted to year-round use often carry undersized heating, thin insulation and foundations never built to Iowa frost depth. Lake-adjacent groundwater also puts real load on sump systems and drain tile, so they are worth testing rather than assuming.
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