Murray County, MN radon potential

EPA places Murray County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 74th percentile for radon potential — Murray County outranks 74% of every county EPA has rated.

How Murray County compares

Murray County, Minnesota is home to about 8,044 people across 704.667 square miles. Averaged across its land area, Murray County runs about 11 people per square mile. Within its own EPA zone, Murray County is bigger by population than 23% of the counties that share it. Geologically, Murray County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

Zone vs. an actual test

Murray County carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. A Zone 1 rating means testing is worth doing sooner rather than later, but it is still county-wide average, not a reading for any single house — some homes in Murray County will test well under the action level, and EPA's guidance is to test regardless of zone.

If Murray County tests above the action level

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 Minnesota's state radon program

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

Where Murray County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Murray County carries, the zone explainer covers what it does and doesn't tell you about any one house.