Sutter County, CA radon potential

Sutter 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 Sutter County lands in the 26th percentile for radon potential.

Sutter County by the numbers

Sutter County, California is home to about 98,545 people across 602.696 square miles. That works out to roughly 164 people per square mile. Within its own EPA zone, Sutter County is bigger by population than 79% of the counties that share it. EPA's geology-based Region 9 groups Sutter County with 94 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Sutter County's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Sutter County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Sutter County

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 California's state radon program

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

Where Sutter County's figures come from

Sutter County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.