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Radon Testing · Denison, IA

Radon Testing in Denison

Radon Testing in Denison, IA by Closer Look Inspectors. A photo-mapped digital report within 24 hours.

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Denison · Crawford County

Radon Testing in Denison

Radon Testing in Denison, Crawford County, by Closer Look Inspectors. Denison is the Crawford County seat on the Boyer River, laid out in 1856, and we calibrate every visit to that.

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.

Denison is served by our Ida Grove team →

Modern white farmhouse-style home with black windows and dark garage doors — Radon Testing in Denison, IADenison
Calibrated

Tuned to Denison.

Denison housing runs to a wide range from the 1856 townsite and 1875 incorporation through Victorian, early-1900s and postwar houses, to newer subdivisions on the edges, across the blocks around the Crawford County Courthouse, the Boyer River corridor, and the newer streets at the edge of town, on loess-capped ridges of the Southern Iowa Drift Plain along the Boyer River valley — and that mix shapes what a radon testing here needs to find. Instrument-grade tools, a local eye, every visit.

Local conditions in Denison

No Iowa law requires a home inspection before a sale — the one mandatory time-of-transfer inspection covers private septic systems (Iowa Code 455B.172) — which makes an independent inspection the only thorough, buyer-side read on a Denison home. Denison sits in Crawford County, and every Iowa county is EPA Radon Zone 1. Iowa HHS reports Iowa has the largest percentage of homes above the 4.0 pCi/L action level of any state — 71.6 percent in the Iowa Radon Survey — and the Iowa seller disclosure form asks for any known radon test results. Finished basements concentrate it, and only a 48-hour test gives you this home's number. Iowa leaves frost depth to the local building code rather than one statewide number, and the annual freeze-thaw cycle drives the settlement cracks and ice-dam wear we calibrate every Denison visit to find.

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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.
Is a Denison house near the Boyer River a flood question?
It can be. Denison is the county seat of Crawford County and sits along the Boyer River, so anything low near the river needs its flood map status checked before you close. On the inspection side we look for evidence of past water in basements, grading and drainage, foundation cracks and sump pump condition. Because the town was laid out in 1856 and incorporated in 1875, we also date older wiring, plumbing and roofing carefully, and read foundations for movement in loess-derived clays. Crawford County is EPA Radon Zone 1.
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