What EPA's radon map says about Anderson County

EPA places Anderson County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 38th percentile for radon potential — Anderson County outranks 38% of every county EPA has rated.

Anderson County by the numbers

About 7,908 people live in Anderson County, Kansas, spread over 579.641 square miles. That works out to roughly 14 people per square mile. Among counties sharing Anderson County's EPA zone, it outranks 16% of them by population. EPA's geology-based Region 7 groups Anderson County with 411 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

EPA's Zone 2 rating for Anderson County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Anderson County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

If Anderson County tests above the action level

Mitigation cost doesn't depend on Anderson 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

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

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.