Cameron County, TX radon potential

Cameron County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Cameron County lands in the 31st percentile for radon potential.

Where Cameron County sits nationally

Cameron County, Texas is home to about 431,874 people across 891.721 square miles. Population density there runs about 484 people per square mile. Within its own EPA zone, Cameron County is bigger by population than 94% of the counties that share it. Geologically, Cameron County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

A Zone 3 county like Cameron County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. A Zone 3 rating means Cameron County'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 Cameron 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 Texas's state radon program

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

Where Cameron County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Cameron County carries, the zone explainer covers what it does and doesn't tell you about any one house.