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Radon Testing · Ottosen, IA

Radon Testing in Ottosen

Radon Testing in Ottosen, IA: Ottosen is a very small town, with just 19 housing units in the 2020 census. Report within 24 hours.

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Ottosen · Humboldt County

Radon Testing in Ottosen

Radon Testing in Ottosen, Humboldt County, by Closer Look Inspectors. Ottosen is a small Norwegian-settled elevator town in western Humboldt County.

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.

Questions about a Ottosen home?  ·  Call or text (563) 517-7815

Split-level home with stone facing on a sloped lot — Radon Testing in Ottosen, IAOttosen
Local housing

Homes in Ottosen.

Ottosen housing runs to about twenty older homes around the historic grain elevator, across the village core, on flat Des Moines Lobe till in western Humboldt County — and that mix shapes what a radon testing here needs to find.

Local conditions in Ottosen

Every Iowa county is in EPA Radon Zone 1, and Humboldt County is no exception, so a home in Ottosen should be tested. Ottosen is a very small town, with just 19 housing units in the 2020 census. Whether a house has a basement or a crawl space, we place the monitor in the lowest livable level under closed-house conditions, check that the test runs undisturbed, and explain the result in plain terms, including when mitigation is worth discussing.

Local facts checked October 2026 against: Wikipedia.

Radon Testing in Ottosen: what matters

Walkout lower level, winter: radon testing in Ottosen, IA
New Construction Inspection in Ottosen →
Crawlspace with sealed vapor barrier, newer: radon testing in Ottosen, IA
11-Month Warranty Inspection in Ottosen →
Finished lower-level bedroom, older: radon testing in Ottosen, IA
Residential Inspection in Ottosen →

Home inspection in Ottosen →  ·  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.
Do you cover Ottosen?
Yes — Ottosen is inside our Fort Dodge coverage, served from Buffalo Center. Much of the original town burned in the mid-1900s and was never rebuilt, so the homes that remain are a small, old stock. The inspection dates every major system, reads foundations and grading on slow-draining till, and includes a 48-hour radon test for Humboldt County's Zone 1 standing.
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