Is Martinsville city, VA a radon risk area?

EPA's own radon map rates Martinsville city zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally, Martinsville city ranks higher in radon potential than 9% of rated counties (the 9th percentile).

Martinsville city by the numbers

About 13,834 people live in Martinsville city, Virginia, spread over 10.956 square miles. Population density there runs about 1,263 people per square mile. Rank 735 by population within its EPA zone puts Martinsville city at the 29th percentile among zone peers.

Zone vs. an actual test

Martinsville city's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 label describes Martinsville city's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Martinsville city

Nothing about Martinsville city'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 Virginia's state radon program

Martinsville city's test kit answers today; a Airthings radon monitor keeps answering for Martinsville city 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

Martinsville city's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.