Bethel Census Area, AK radon potential

EPA's own radon map rates Bethel Census Area zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Bethel Census Area in the 12th percentile nationally for radon potential — higher than 12% of the counties EPA has rated.

Bethel Census Area by the numbers

Bethel Census Area, Alaska is home to about 18,237 people across 40,654.878 square miles. That works out to roughly 0 people per square mile. Within its own EPA zone, Bethel Census Area is bigger by population than 36% of the counties that share it. Geologically, Bethel Census Area is grouped into EPA Region 10 alongside 141 other counties that share its rock and soil setting.

Zone vs. an actual test

At Zone 3, Bethel Census Area's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Bethel Census Area testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in Bethel Census Area

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 Alaska's state radon program

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

Where Bethel Census Area's figures come from

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