What EPA's radon map says about Anchorage Municipality

EPA places Anchorage Municipality in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Anchorage Municipality sits at the 63rd percentile nationally for radon potential — above 63 of every 100 rated counties.

Anchorage Municipality by the numbers

About 289,600 people live in Anchorage Municipality, Alaska, spread over 1,706.802 square miles. That works out to roughly 170 people per square mile. Among counties sharing Anchorage Municipality's EPA zone, it outranks 92% of them by population. EPA's geology-based Region 10 groups Anchorage Municipality with 141 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Anchorage Municipality

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Anchorage Municipality's Zone 2 prediction lands in the gap between the two. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Anchorage Municipality — testing is the only way to know an individual home's actual level.

If Anchorage Municipality tests above the action level

Mitigation cost doesn't depend on Anchorage Municipality'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

Anchorage Municipality's test kit answers today; a Airthings radon monitor keeps answering for Anchorage Municipality 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

Anchorage Municipality's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.