Kossuth County, IA radon potential

EPA's own radon map rates Kossuth County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Nationally that's the 79th percentile for radon potential — Kossuth County outranks 79% of every county EPA has rated.

Kossuth County by the numbers

Kossuth County, Iowa is home to about 14,408 people across 972.735 square miles. That works out to roughly 15 people per square mile. Within its own EPA zone, Kossuth County is bigger by population than 37% of the counties that share it. EPA's geology-based Region 7 groups Kossuth County with 411 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Kossuth County

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Kossuth County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Kossuth County will test well under the action level, and EPA's guidance is to test regardless of zone.

Testing and mitigation in Kossuth 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 Kossuth County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Kossuth County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Kossuth County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Kossuth County carries, the zone explainer covers what it does and doesn't tell you about any one house.