What EPA's radon map says about Amelia County
EPA places Amelia 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. That puts Amelia County in the 78th percentile nationally for radon potential — higher than 78% of the counties EPA has rated.
Amelia County by the numbers
About 13,716 people live in Amelia County, Virginia, spread over 355.36 square miles. Averaged across its land area, Amelia County runs about 39 people per square mile. Among counties sharing Amelia County's EPA zone, it outranks 35% of them by population. Amelia County falls in EPA Radon Region 3, one of 245 counties nationally EPA assigns to that same geologic province.
Zone vs. an actual test
Amelia County's predicted average sits above EPA's own action level of 4 pCi/L — the concentration at which EPA recommends fixing a home — versus a national average around 1.3 pCi/L indoors and 0.4 pCi/L outdoors. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Amelia County will test well under the action level, and EPA's guidance is to test regardless of zone.
If Amelia County tests above the action level
Mitigation cost doesn't depend on Amelia 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 Virginia's state radon program
Amelia County's test kit answers today; a Airthings radon monitor keeps answering for Amelia 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 Amelia County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.