Is Worth County, MO a radon risk area?

EPA's own radon map rates Worth County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally that's the 34th percentile for radon potential — Worth County outranks 34% of every county EPA has rated.

Worth County by the numbers

About 1,872 people live in Worth County, Missouri, spread over 266.629 square miles. Averaged across its land area, Worth County runs about 7 people per square mile. Rank 1006 by population within its EPA zone puts Worth County at the 3rd percentile among zone peers. EPA's geology-based Region 7 groups Worth County with 411 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Worth County's Zone 2 prediction. Middle-of-the-pack doesn't mean risk-free for any one Worth County address — a moderate county average still leaves individual homes to test either side of it.

Next steps for a home in Worth County

Nothing about Worth County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Missouri's state radon program

Worth County's test kit answers today; a Airthings radon monitor keeps answering for Worth 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

Worth County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.