What EPA's radon map says about Rush County

EPA places Rush County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 68th percentile for radon potential — Rush County outranks 68% of every county EPA has rated.

How Rush County compares

About 2,810 people live in Rush County, Kansas, spread over 717.763 square miles. Averaged across its land area, Rush County runs about 4 people per square mile. Among counties sharing Rush County's EPA zone, it outranks 7% of them by population. Geologically, Rush County is grouped into EPA Region 7 alongside 411 other counties that share its rock and soil setting.

Zone vs. an actual test

Where the national indoor average runs about 1.3 pCi/L, Rush County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. That doesn't mean every Rush County house tests high — a zone is a county-wide prediction, never a single-home reading — but it's a reason to test sooner rather than let it wait.

Testing and mitigation in Rush County

Mitigation cost doesn't depend on Rush County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Kansas's state radon program

Rush County's test kit answers today; a Airthings radon monitor keeps answering for Rush County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Rush County's numbers. Whatever zone Rush County carries, the zone explainer covers what it does and doesn't tell you about any one house.