Scott County, IA Radon Zone Data

Scott County, IA radon potential

EPA's own radon map rates Scott County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally, Scott County ranks higher in radon potential than 97% of rated counties (the 97th percentile).

Where Scott County sits nationally

Scott County, Iowa is home to about 175,601 people across 458.101 square miles. Averaged across its land area, Scott County runs about 383 people per square mile. Within its own EPA zone, Scott County is bigger by population than 90% of the counties that share it. Geologically, Scott County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Fixing a home becomes an EPA recommendation past 4 pCi/L, and that is precisely the side of the line Scott County's Zone 1 prediction lands on, well above the roughly 1.3 pCi/L most US homes average. Being in Zone 1 raises the odds Scott County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.

Next steps for a home in Scott County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Iowa's state radon program

For Scott County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Scott County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Scott County's figures come from

Scott County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Scott County carries, the zone explainer covers what it does and doesn't tell you about any one house.