Is Newport County, RI a radon risk area?

Newport County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Rank it against the rest of the country and Newport County lands in the 59th percentile for radon potential.

Where Newport County sits nationally

About 83,468 people live in Newport County, Rhode Island, spread over 102.431 square miles. Averaged across its land area, Newport County runs about 815 people per square mile. Rank 229 by population within its EPA zone puts Newport County at the 78th percentile among zone peers. Geologically, Newport County is grouped into EPA Region 1 alongside 58 other counties that share its rock and soil setting.

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 Newport County's Zone 2 prediction. A county-wide moderate average, like Newport County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in Newport County

Nothing about Newport 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 Rhode Island's state radon program

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

The methodology guide shows exactly which EPA and Census sources feed Newport County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.