Is Wrangell City and Borough, AK a radon risk area?

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

Where Wrangell City and Borough sits nationally

About 2,064 people live in Wrangell City and Borough, Alaska, spread over 2,556.105 square miles. That works out to roughly 1 people per square mile.

Zone vs. an actual test

Without a zone rating for Wrangell City and Borough to compare, the two national reference points still apply: EPA's action level is 4 pCi/L, against a national indoor average around 1.3 pCi/L and outdoor air near 0.4 pCi/L. 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.

Testing and mitigation in Wrangell City and Borough

Nothing about Wrangell City and Borough'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

Wrangell City and Borough's test kit answers today; a Airthings radon monitor keeps answering for Wrangell City and Borough over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Wrangell City and Borough's numbers. The coverage gaps guide covers every county EPA's map can't rate directly and why.