Radon Mitigation in Story City, IA

Story City, IA sits about 11 miles north of Ames up I-35, a town of around 3,400 with its own long-standing identity in north Story County. What it shares with every other town in the county is the ground: uranium-bearing glacial till, the legacy of Ice Age glaciers grinding rock down from the north, and the reason all of Iowa carries the EPA’s Zone 1 designation. Iowa’s indoor average of 8.5 pCi/L is more than six times the national number, and north Story County soil wasn’t consulted for an exception.

Radon services in Story City (50248)

• Radon testing, short-term and 48-hour continuous-monitor reports
• Sub-slab depressurization system installation
• System repair, fan replacement, and manometer checks
• Passive-system activation for homes built under the 2026 new-construction law

The Story City radon picture

Central Iowa housing means basements, and basements in this soil mean exposure paths: sump pits, floor drains, slab cracks, and the joint where slab meets wall. Story City’s mix of established in-town homes and newer edge construction spans every age of foundation, and the till underneath varies enough that neighboring houses read completely differently. That variability is the whole argument for testing: with 71.6% of Iowa homes at or above the 4.0 action level, “probably fine” is a bet against posted odds.

Winter sharpens everything. The closed-house season, roughly November through April this far north, is when stack effect pulls soil gas hardest and when a test gives you the number worth acting on. It’s also when a mitigation system earns its keep, holding negative pressure under the slab while the house above runs sealed and heated.

When the number comes back high

Sub-slab depressurization is the standard fix and a proven one in Iowa basements: suction point, vent pipe above the roofline, inline fan, manometer, then a retest to prove the result, below 4.0 always, below 2.0 usually. Iowa Code 136B requires that mitigation-for-hire come from a state-credentialed specialist, so whoever quotes your Story City house, ask for the Iowa credential first.

Free quotes across Story City and all of Story County. Call with your address and your test result if you have one, and you’ll get a straight answer, including “you don’t need us” when the number says so.