What EPA's radon map says about Fredericksburg city

Fredericksburg city is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Fredericksburg city sits at the 18th percentile nationally for radon potential — above 18 of every 100 rated counties.

Where Fredericksburg city sits nationally

About 29,992 people live in Fredericksburg city, Virginia, spread over 10.45 square miles. Averaged across its land area, Fredericksburg city runs about 2,870 people per square mile. Among counties sharing Fredericksburg city's EPA zone, it outranks 53% of them by population.

Why the zone isn't the answer by itself

Fredericksburg 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 rating means Fredericksburg city's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Testing and mitigation in Fredericksburg city

Mitigation cost doesn't depend on Fredericksburg city'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

Fredericksburg city's test kit answers today; a Airthings radon monitor keeps answering for Fredericksburg city 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. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.