Kusilvak Census Area, AK: EPA's radon zone, explained

Kusilvak Census Area falls outside what EPA's 1993 radon zone map can rate directly, because its boundaries were redrawn after the map was made — the coverage gaps guide explains exactly which counties this affects and why.

Where Kusilvak Census Area sits nationally

Kusilvak Census Area, Alaska is home to about 7,946 people across 17,151.47 square miles. That works out to roughly 0 people per square mile.

Why the zone isn't the answer by itself

EPA's 4 pCi/L action level and the roughly 1.3 pCi/L national indoor average apply to Kusilvak Census Area the same as anywhere, even without a zone rating to place it against. EPA's guidance is unchanged by the absence of a zone rating here: test every home, since a zone (where one exists) only describes a county-wide average, never an individual house.

Next steps for a home in Kusilvak Census Area

For a Kusilvak Census Area 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 Alaska's state radon program

For Kusilvak Census Area, an ongoing number beats a one-time test - a Airthings radon monitor tracks Kusilvak Census Area'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 Kusilvak Census Area'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. See the coverage gaps guide for the full list of boundary changes EPA's map predates.