Kalkaska County, MI radon potential

Kalkaska County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Kalkaska County lands in the 12th percentile for radon potential.

Where Kalkaska County sits nationally

Kalkaska County, Michigan is home to about 18,618 people across 559.744 square miles. Population density there runs about 33 people per square mile. Within its own EPA zone, Kalkaska County is bigger by population than 37% of the counties that share it. EPA's geology-based Region 5 groups Kalkaska County with 523 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

At Zone 3, Kalkaska County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. A Zone 3 label describes Kalkaska County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

If Kalkaska 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 Michigan's state radon program

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

Where Kalkaska County's figures come from

Kalkaska County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Kalkaska County carries, the zone explainer covers what it does and doesn't tell you about any one house.