Last updated: 2026-05-23
Iowa Indoor Air Quality Guide
Iowa has the #1 highest radon levels in the US — every home should be tested
Zone 1 — Highest potential (predicted average > 4 pCi/L)
Radon Levels in Iowa
Average Radon Level
8.1 pCi/L
EPA Zone
Zone 1
Iowa has the highest radon levels in the US. The entire state is Zone 1. Glacial deposits over uranium-rich shale create extreme readings. Average home tests at 8+ pCi/L.
⚠️ Testing strongly recommended
Iowa is Zone 1 — the highest risk category. Test every home. If levels are 4 pCi/L or above, install a mitigation system immediately.
Top Indoor Air Hazards in Iowa
Radon Gas
CRITICALRadon is the #2 cause of lung cancer after smoking. It seeps from soil into basements and crawl spaces. You cannot see, smell, or taste it. The only way to know is to test.
Carbon Monoxide (CO)
CRITICALCO is a silent killer — colorless, odorless, and lethal at high concentrations. It binds to hemoglobin 200x more than oxygen. Every home with fuel-burning appliances needs a CO detector.
Poor Ventilation (Stale Air)
MODERATEModern energy-efficient homes trap pollutants indoors. Without adequate ventilation, CO2, VOCs, and airborne pathogens accumulate to levels 2-5x higher than outdoors. This is called sick building syndrome.
Iowa Climate & Air Quality Factors
Long cold winters mean homes are sealed for 6+ months, concentrating radon. Agricultural chemicals can drift indoors. Many farm homes have multiple exposure risks.
Recommended Products for Iowa Homes
First Alert Radon Gas Test Kit
EPA-listed short-term radon test. Lab fees included. Results in days.
Airthings Corentium Home Radon Detector
Continuous digital radon monitoring. No lab fees. Real-time readings.
RadonAway RP140 Radon Mitigation Fan
Professional-grade radon mitigation fan. 4-inch. The core component of any radon reduction system. Cuts radon levels by up to 99%.
Kidde Carbon Monoxide Detector
Plug-in CO alarm with battery backup. Digital display. Peak level memory.
Disclaimer
State-level radon data from EPA Zone Map. Individual home levels vary significantly. This guide is for educational purposes and not a substitute for professional environmental testing. Test your home regardless of zone designation.
Guidance sourced from EPA, CDC, and Health Canada publications.