Prince George's County, MD Radon Zone Data

Prince George's County, MD radon potential

EPA's own radon map rates Prince George's County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. That puts Prince George's County in the 65th percentile nationally for radon potential — higher than 65% of the counties EPA has rated.

Prince George's County by the numbers

Prince George's County, Maryland is home to about 966,629 people across 482.601 square miles. Population density there runs about 2,003 people per square mile. Within its own EPA zone, Prince George's County is bigger by population than 98% of the counties that share it. Geologically, Prince George's County is grouped into EPA Region 3 alongside 244 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Prince George's County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). A county-wide moderate average, like Prince George's County's, can still hide a specific house well above or below it — testing is what actually answers the question.

Testing and mitigation in Prince George's County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Maryland's state radon program

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

Where Prince George's County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Prince George's County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.