What EPA's radon map says about Prince of Wales-Hyder Census Area

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

Prince of Wales-Hyder Census Area by the numbers

About 5,746 people live in Prince of Wales-Hyder Census Area, Alaska, spread over 5,268.076 square miles. Population density there runs about 1 people per square mile.

What this actually means for a house in Prince of Wales-Hyder Census Area

EPA's 4 pCi/L action level and the roughly 1.3 pCi/L national indoor average apply to Prince of Wales-Hyder 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.

If Prince of Wales-Hyder Census Area tests above the action level

Mitigation cost doesn't depend on Prince of Wales-Hyder Census Area's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Alaska's state radon program

Prince of Wales-Hyder Census Area's test kit answers today; a Airthings radon monitor keeps answering for Prince of Wales-Hyder 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.