Is Chugach Census Area, AK a radon risk area?

EPA's Map of Radon Zones does not carry a rating for Chugach Census Area under its current boundaries — the map dates to 1993 and this county's borders have changed since (see the coverage gaps guide).

Where Chugach Census Area sits nationally

About 6,604 people live in Chugach Census Area, Alaska, spread over 9,574.349 square miles. That works out to roughly 1 people per square mile.

Zone vs. an actual test

EPA's 4 pCi/L action level and the roughly 1.3 pCi/L national indoor average apply to Chugach 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 Chugach Census Area

Nothing about Chugach Census Area's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Alaska's state radon program

Chugach Census Area's test kit answers today; a Airthings radon monitor keeps answering for Chugach Census Area over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The coverage gaps guide covers every county EPA's map can't rate directly and why.