Matanuska-Susitna Borough, AK radon potential

EPA places Matanuska-Susitna Borough 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. Matanuska-Susitna Borough sits at the 60th percentile nationally for radon potential — above 60 of every 100 rated counties.

Where Matanuska-Susitna Borough sits nationally

Matanuska-Susitna Borough, Alaska is home to about 117,613 people across 24,707.115 square miles. Population density there runs about 5 people per square mile. Within its own EPA zone, Matanuska-Susitna Borough is bigger by population than 83% of the counties that share it. EPA's geology-based Region 10 groups Matanuska-Susitna Borough with 141 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Matanuska-Susitna Borough's Zone 2 prediction. Matanuska-Susitna Borough's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Testing and mitigation in Matanuska-Susitna Borough

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Alaska's state radon program

For Matanuska-Susitna Borough, an ongoing number beats a one-time test - a Airthings radon monitor tracks Matanuska-Susitna Borough's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Matanuska-Susitna Borough's figures come from

The methodology guide shows exactly which EPA and Census sources feed Matanuska-Susitna Borough's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.