Charles City County, VA Radon Zone Data

Charles City County, VA: EPA's radon zone, explained

EPA places Charles City County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Charles City County ranks higher in radon potential than 4% of rated counties (the 4th percentile).

How Charles City County compares

Charles City County, Virginia is home to about 6,564 people across 182.901 square miles. Population density there runs about 36 people per square mile. By population, Charles City County is the 913th largest of every county sharing its EPA zone — the 11th percentile by population within that zone. Geologically, Charles City County is grouped into EPA Region 3 alongside 244 other counties that share its rock and soil setting.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Charles City County's Zone 3 prediction is the low end of the scale. Don't read Zone 3 as a pass for Charles City County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Charles City County

For a Charles City County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Virginia's state radon program

For Charles City County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Charles City County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Charles City County's figures come from

Charles City County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Charles City County carries, the zone explainer covers what it does and doesn't tell you about any one house.